## René Descartes was born on this day 421 years ago.

### Properties of the number 99558:

99558 = 2 × 3^{2}× 5531 is the 90006

^{th}composite number and is not squarefree.

99558 has 3 distinct prime factors, 12 divisors, 13 antidivisors and 33180 totatives.

99558 has a triangular digit sum 36 in base 10.

99558 is the difference of 2 positive pentagonal numbers in 2 ways.

99558 = 34

^{2}+ 41

^{2}+ 311

^{2}is the sum of 3 positive squares.

99558

^{2}is the sum of 3 positive squares.

99558 is a divisor of 239

^{30}- 1.

99558 = '995' + '58' is the concatenation of 2 semiprime numbers.

99558 is palindromic in (at least) the following bases: -58, and -94.

99558 in base 11 = 68888 and consists of only the digits '6' and '8'.

99558 in base 57 = Uaa and consists of only the digits 'U' and 'a'.

### The number 99558 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequence (among others):

Sequence number and description below are taken from OEIS.A101277: Number of partitions of 2n in which all odd parts occur with multiplicity 2. There is no restriction on the even parts.

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