31860605133 has 12 divisors (see below), whose sum is σ = 52595284768. Its totient is φ = 18206060040.

The previous prime is 31860605111. The next prime is 31860605143. The reversal of 31860605133 is 33150606813.

It is a happy number.

31860605133 is a `hidden beast` number, since 3 + 1 + 86 + 0 + 60 + 513 + 3 = 666.

It is not a de Polignac number, because 31860605133 - 2¹⁸ = 31860342989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31860605143) 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, 252861883 + ... + 252862008.

Almost surely, 2^31860605133 is an apocalyptic number.

It is an amenable number.

31860605133 is a deficient number, since it is larger than the sum of its proper divisors (20734679635).

31860605133 is a wasteful number, since it uses less digits than its factorization.

31860605133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505723904 (or 505723901 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 31860605133 in words is "thirty-one billion, eight hundred sixty million, six hundred five thousand, one hundred thirty-three".