Number of the day: 7222016

Happy Casual π Day!

Properties of the number 7222016:

7222016 = 2⁸ × 28211 is the 6731302^th composite number and is not squarefree.
7222016 has 2 distinct prime factors, 18 divisors, 17 antidivisors and 3610880 totatives.
7222016 has an oblong digit sum 20 in base 10.
Reversing the decimal digits of 7222016 results in a semiprime.
7222016 = 1805505² - 1805503² = 902754² - 902750² = 451380² - 451372² = 225696² - 225680² = 112860² - 112828² = 56454² - 56390² = 28275² - 28147² is the difference of 2 nonnegative squares in 7 ways.
7222016 is the sum of 2 positive triangular numbers.
7222016 is the difference of 2 positive pentagonal numbers in 1 way.
7222016 = 176² + 624² + 2608² is the sum of 3 positive squares.
7222016² is the sum of 3 positive squares.
7222016 is a divisor of 593¹¹² - 1.
7222016 = '722201' + '6' is the concatenation of 2 semiprime numbers.