831525138 has 12 divisors (see below), whose sum is σ = 1801637838. Its totient is φ = 277175040.

The previous prime is 831525137. The next prime is 831525143.

831525138 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 748405449 + 83119689 = 27357^2 + 9117^2 .

It is not an unprimeable number, because it can be changed into a prime (831525133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23097903 + ... + 23097938.

Almost surely, 2^831525138 is an apocalyptic number.

831525138 is an abundant number, since it is smaller than the sum of its proper divisors (970112700).

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

831525138 is a wasteful number, since it uses less digits than its factorization.

831525138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46195849 (or 46195846 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 831525138 is about 28836.1775899650. The cubic root of 831525138 is about 940.3549052190.

The spelling of 831525138 in words is "eight hundred thirty-one million, five hundred twenty-five thousand, one hundred thirty-eight".