79722531 has 48 divisors (see below), whose sum is σ = 141133824. Its totient is φ = 42368832.

The previous prime is 79722529. The next prime is 79722541. The reversal of 79722531 is 13522797.

It is not a de Polignac number, because 79722531 - 2¹ = 79722529 is a prime.

It is a super-2 number, since 2×79722531² = 12711363898091922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79722541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52870 + ... + 54356.

It is an arithmetic number, because the mean of its divisors is an integer number (2940288).

Almost surely, 2^79722531 is an apocalyptic number.

79722531 is a deficient number, since it is larger than the sum of its proper divisors (61411293).

79722531 is a wasteful number, since it uses less digits than its factorization.

79722531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 1557 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 79722531 is about 8928.7474485507. The cubic root of 79722531 is about 430.3882035981.

The spelling of 79722531 in words is "seventy-nine million, seven hundred twenty-two thousand, five hundred thirty-one".