231313310131 has 4 divisors (see below), whose sum is σ = 239289631200. Its totient is φ = 223336989064.

The previous prime is 231313310119. The next prime is 231313310171. The reversal of 231313310131 is 131013313132.

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

It is a cyclic number.

It is not a de Polignac number, because 231313310131 - 2¹⁹ = 231312785843 is a prime.

It is a super-2 number, since 2×231313310131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231313310171) 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, 3988160491 + ... + 3988160548.

It is an arithmetic number, because the mean of its divisors is an integer number (59822407800).

Almost surely, 2^231313310131 is an apocalyptic number.

231313310131 is a deficient number, since it is larger than the sum of its proper divisors (7976321069).

231313310131 is an equidigital number, since it uses as much as digits as its factorization.

231313310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976321068.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 231313310131 its reverse (131013313132), we get a palindrome (362326623263).

The spelling of 231313310131 in words is "two hundred thirty-one billion, three hundred thirteen million, three hundred ten thousand, one hundred thirty-one".