31345661631031 has 16 divisors (see below), whose sum is σ = 34923680437248. Its totient is φ = 27889074690400.

The previous prime is 31345661630989. The next prime is 31345661631091. The reversal of 31345661631031 is 13013616654313.

It is not a de Polignac number, because 31345661631031 - 2³³ = 31337071696439 is a prime.

It is a super-2 number, since 2×31345661631031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345661631091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21030141 + ... + 22471273.

It is an arithmetic number, because the mean of its divisors is an integer number (2182730027328).

Almost surely, 2^{31345661631031} is an apocalyptic number.

31345661631031 is a deficient number, since it is larger than the sum of its proper divisors (3578018806217).

31345661631031 is a wasteful number, since it uses less digits than its factorization.

31345661631031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483262.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 31345661631031 in words is "thirty-one trillion, three hundred forty-five billion, six hundred sixty-one million, six hundred thirty-one thousand, thirty-one".