31013171056451 has 4 divisors (see below), whose sum is σ = 31013186141112. Its totient is φ = 31013155971792.

The previous prime is 31013171056433. The next prime is 31013171056493. The reversal of 31013171056451 is 15465017131013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31013171056451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31013171086451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3858746 + ... + 8770191.

It is an arithmetic number, because the mean of its divisors is an integer number (7753296535278).

Almost surely, 2^{31013171056451} is an apocalyptic number.

31013171056451 is a deficient number, since it is larger than the sum of its proper divisors (15084661).

31013171056451 is a wasteful number, since it uses less digits than its factorization.

31013171056451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15084660.

The product of its (nonzero) digits is 37800, while the sum is 38.

Adding to 31013171056451 its reverse (15465017131013), we get a palindrome (46478188187464).

The spelling of 31013171056451 in words is "thirty-one trillion, thirteen billion, one hundred seventy-one million, fifty-six thousand, four hundred fifty-one".