231315288131 has 12 divisors (see below), whose sum is σ = 244188032832. Its totient is φ = 219089191824.

The previous prime is 231315288107. The next prime is 231315288173. The reversal of 231315288131 is 131882513132.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-231315288131 is a prime.

It is a super-2 number, since 2×231315288131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231315288931) 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, 1505390 + ... + 1651916.

It is an arithmetic number, because the mean of its divisors is an integer number (20349002736).

Almost surely, 2^231315288131 is an apocalyptic number.

231315288131 is a deficient number, since it is larger than the sum of its proper divisors (12872744701).

231315288131 is a wasteful number, since it uses less digits than its factorization.

231315288131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150938 (or 150919 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The spelling of 231315288131 in words is "two hundred thirty-one billion, three hundred fifteen million, two hundred eighty-eight thousand, one hundred thirty-one".