231332130131 has 4 divisors (see below), whose sum is σ = 232996390200. Its totient is φ = 229667870064.

The previous prime is 231332130101. The next prime is 231332130163. The reversal of 231332130131 is 131031233132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231332130131 is a prime.

It is a super-2 number, since 2×231332130131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231332130097 and 231332130106.

It is not an unprimeable number, because it can be changed into a prime (231332130101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832129826 + ... + 832130103.

It is an arithmetic number, because the mean of its divisors is an integer number (58249097550).

Almost surely, 2^231332130131 is an apocalyptic number.

231332130131 is a deficient number, since it is larger than the sum of its proper divisors (1664260069).

231332130131 is a wasteful number, since it uses less digits than its factorization.

231332130131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664260068.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 231332130131 its reverse (131031233132), we get a palindrome (362363363263).

The spelling of 231332130131 in words is "two hundred thirty-one billion, three hundred thirty-two million, one hundred thirty thousand, one hundred thirty-one".