99131256 has 64 divisors (see below), whose sum is σ = 314707200. Its totient is φ = 28322784.

The previous prime is 99131243. The next prime is 99131261. The reversal of 99131256 is 65213199.

It is a super-2 number, since 2×99131256² = 19654011832275072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 99131256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31270 + ... + 34293.

It is an arithmetic number, because the mean of its divisors is an integer number (4917300).

Almost surely, 2^99131256 is an apocalyptic number.

It is an amenable number.

99131256 is an abundant number, since it is smaller than the sum of its proper divisors (215575944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99131256 is a wasteful number, since it uses less digits than its factorization.

99131256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65585 (or 65575 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 99131256 is about 9956.4680484598. The cubic root of 99131256 is about 462.8108546695.

The spelling of 99131256 in words is "ninety-nine million, one hundred thirty-one thousand, two hundred fifty-six".