79320213531 has 12 divisors (see below), whose sum is σ = 123386999008. Its totient is φ = 48812439024.

The previous prime is 79320213443. The next prime is 79320213563. The reversal of 79320213531 is 13531202397.

It is a happy number.

79320213531 is a `hidden beast` number, since 7 + 93 + 20 + 2 + 13 + 531 = 666.

It is not a de Polignac number, because 79320213531 - 2⁷ = 79320213403 is a prime.

It is a super-2 number, since 2×79320213531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79320213571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 338975155 + ... + 338975388.

Almost surely, 2^79320213531 is an apocalyptic number.

79320213531 is a deficient number, since it is larger than the sum of its proper divisors (44066785477).

79320213531 is a wasteful number, since it uses less digits than its factorization.

79320213531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677950562 (or 677950559 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The spelling of 79320213531 in words is "seventy-nine billion, three hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".