31516262643 has 4 divisors (see below), whose sum is σ = 42021683528. Its totient is φ = 21010841760.

The previous prime is 31516262641. The next prime is 31516262669. The reversal of 31516262643 is 34626261513.

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

It is not a de Polignac number, because 31516262643 - 2¹ = 31516262641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31516262641) 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, 5252710438 + ... + 5252710443.

It is an arithmetic number, because the mean of its divisors is an integer number (10505420882).

Almost surely, 2^31516262643 is an apocalyptic number.

31516262643 is a deficient number, since it is larger than the sum of its proper divisors (10505420885).

31516262643 is a wasteful number, since it uses less digits than its factorization.

31516262643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505420884.

The product of its digits is 155520, while the sum is 39.

The spelling of 31516262643 in words is "thirty-one billion, five hundred sixteen million, two hundred sixty-two thousand, six hundred forty-three".