31040309545 has 48 divisors (see below), whose sum is σ = 44727033600. Its totient is φ = 20604253824.

The previous prime is 31040309477. The next prime is 31040309551. The reversal of 31040309545 is 54590304013.

It is not a de Polignac number, because 31040309545 - 2²¹ = 31038212393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31040309545.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1795332 + ... + 1812538.

It is an arithmetic number, because the mean of its divisors is an integer number (931813200).

Almost surely, 2^31040309545 is an apocalyptic number.

31040309545 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31040309545 is a deficient number, since it is larger than the sum of its proper divisors (13686724055).

31040309545 is a wasteful number, since it uses less digits than its factorization.

31040309545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17462 (or 17455 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 31040309545 in words is "thirty-one billion, forty million, three hundred nine thousand, five hundred forty-five".