231302222031 has 32 divisors (see below), whose sum is σ = 327120519168. Its totient is φ = 145155719520.

The previous prime is 231302222017. The next prime is 231302222033. The reversal of 231302222031 is 130222203132.

It is a happy number.

It is not a de Polignac number, because 231302222031 - 2⁹ = 231302221519 is a prime.

It is a super-2 number, since 2×231302222031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231302221989 and 231302222007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231302222033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550150 + ... + 874796.

It is an arithmetic number, because the mean of its divisors is an integer number (10222516224).

Almost surely, 2^231302222031 is an apocalyptic number.

231302222031 is a deficient number, since it is larger than the sum of its proper divisors (95818297137).

231302222031 is a wasteful number, since it uses less digits than its factorization.

231302222031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324891.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231302222031 its reverse (130222203132), we get a palindrome (361524425163).

The spelling of 231302222031 in words is "two hundred thirty-one billion, three hundred two million, two hundred twenty-two thousand, thirty-one".