83131538 has 32 divisors (see below), whose sum is σ = 146448000. Its totient is φ = 35376432.

The previous prime is 83131511. The next prime is 83131549. The reversal of 83131538 is 83513138.

It is a super-2 number, since 2×83131538² = 13821705220490888, which contains 22 as substring.

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, 122456 + ... + 123132.

It is an arithmetic number, because the mean of its divisors is an integer number (4576500).

Almost surely, 2^83131538 is an apocalyptic number.

83131538 is a deficient number, since it is larger than the sum of its proper divisors (63316462).

83131538 is a wasteful number, since it uses less digits than its factorization.

83131538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 865 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 83131538 is about 9117.6498068307. The cubic root of 83131538 is about 436.4373784755.

The spelling of 83131538 in words is "eighty-three million, one hundred thirty-one thousand, five hundred thirty-eight".