31102204131 has 12 divisors (see below), whose sum is σ = 45052678008. Its totient is φ = 20676061824.

The previous prime is 31102204129. The next prime is 31102204169. The reversal of 31102204131 is 13140220113.

31102204131 is a `hidden beast` number, since 31 + 1 + 0 + 220 + 413 + 1 = 666.

It is not a de Polignac number, because 31102204131 - 2¹ = 31102204129 is a prime.

It is a super-2 number, since 2×31102204131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31102203131) 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 11 ways as a sum of consecutive naturals, for example, 4891725 + ... + 4898078.

It is an arithmetic number, because the mean of its divisors is an integer number (3754389834).

Almost surely, 2^31102204131 is an apocalyptic number.

31102204131 is a deficient number, since it is larger than the sum of its proper divisors (13950473877).

31102204131 is a wasteful number, since it uses less digits than its factorization.

31102204131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9790162 (or 9790159 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31102204131 its reverse (13140220113), we get a palindrome (44242424244).

The spelling of 31102204131 in words is "thirty-one billion, one hundred two million, two hundred four thousand, one hundred thirty-one".