31231340432045 has 16 divisors (see below), whose sum is σ = 40364188628400. Its totient is φ = 23061036762624.

The previous prime is 31231340431997. The next prime is 31231340432063. The reversal of 31231340432045 is 54023404313213.

It can be written as a sum of positive squares in 8 ways, for example, as 14863700490409 + 16367639941636 = 3855347^2 + 4045694^2 .

It is a cyclic number.

It is not a de Polignac number, because 31231340432045 - 2²⁸ = 31231071996589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31231340431996 and 31231340432014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21230144 + ... + 22653513.

It is an arithmetic number, because the mean of its divisors is an integer number (2522761789275).

Almost surely, 2^{31231340432045} is an apocalyptic number.

It is an amenable number.

31231340432045 is a deficient number, since it is larger than the sum of its proper divisors (9132848196355).

31231340432045 is a wasteful number, since it uses less digits than its factorization.

31231340432045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43894624.

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 31231340432045 its reverse (54023404313213), we get a palindrome (85254744745258).

The spelling of 31231340432045 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred forty million, four hundred thirty-two thousand, forty-five".