31223200131 has 12 divisors (see below), whose sum is σ = 45101793360. Its totient is φ = 20814721200.

The previous prime is 31223200103. The next prime is 31223200133. The reversal of 31223200131 is 13100232213.

31223200131 is a `hidden beast` number, since 312 + 2 + 320 + 0 + 1 + 31 = 666.

It is not a de Polignac number, because 31223200131 - 2⁶ = 31223200067 is a prime.

It is a super-2 number, since 2×31223200131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31223200133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340281 + ... + 422181.

It is an arithmetic number, because the mean of its divisors is an integer number (3758482780).

Almost surely, 2^31223200131 is an apocalyptic number.

31223200131 is a deficient number, since it is larger than the sum of its proper divisors (13878593229).

31223200131 is a wasteful number, since it uses less digits than its factorization.

31223200131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124266 (or 124263 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31223200131 its reverse (13100232213), we get a palindrome (44323432344).

The spelling of 31223200131 in words is "thirty-one billion, two hundred twenty-three million, two hundred thousand, one hundred thirty-one".