231313230131 has 4 divisors (see below), whose sum is σ = 238774947264. Its totient is φ = 223851513000.

The previous prime is 231313230119. The next prime is 231313230133. The reversal of 231313230131 is 131032313132.

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 231313230131 - 2⁶ = 231313230067 is a prime.

It is a super-2 number, since 2×231313230131² (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 = 231313230097 and 231313230106.

It is not an unprimeable number, because it can be changed into a prime (231313230133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3730858520 + ... + 3730858581.

It is an arithmetic number, because the mean of its divisors is an integer number (59693736816).

Almost surely, 2^231313230131 is an apocalyptic number.

231313230131 is a deficient number, since it is larger than the sum of its proper divisors (7461717133).

231313230131 is an equidigital number, since it uses as much as digits as its factorization.

231313230131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7461717132.

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

Adding to 231313230131 its reverse (131032313132), we get a palindrome (362345543263).

The spelling of 231313230131 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred thirty thousand, one hundred thirty-one".