231302222131 has 4 divisors (see below), whose sum is σ = 231596126632. Its totient is φ = 231008317632.

The previous prime is 231302222083. The next prime is 231302222161. The reversal of 231302222131 is 131222203132.

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 231302222131 - 2²⁵ = 231268667699 is a prime.

It is a super-2 number, since 2×231302222131² (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 (231302222161) 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, 146951070 + ... + 146952643.

It is an arithmetic number, because the mean of its divisors is an integer number (57899031658).

Almost surely, 2^231302222131 is an apocalyptic number.

231302222131 is a deficient number, since it is larger than the sum of its proper divisors (293904501).

231302222131 is an equidigital number, since it uses as much as digits as its factorization.

231302222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293904500.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231302222131 its reverse (131222203132), we get a palindrome (362524425263).

The spelling of 231302222131 in words is "two hundred thirty-one billion, three hundred two million, two hundred twenty-two thousand, one hundred thirty-one".