31309471854 has 48 divisors (see below), whose sum is σ = 69702787440. Its totient is φ = 10149736320.

The previous prime is 31309471807. The next prime is 31309471859. The reversal of 31309471854 is 45817490313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31309471859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1616077 + ... + 1635335.

It is an arithmetic number, because the mean of its divisors is an integer number (1452141405).

Almost surely, 2^31309471854 is an apocalyptic number.

31309471854 is an abundant number, since it is smaller than the sum of its proper divisors (38393315586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31309471854 is a wasteful number, since it uses less digits than its factorization.

31309471854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21745 (or 21742 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 31309471854 in words is "thirty-one billion, three hundred nine million, four hundred seventy-one thousand, eight hundred fifty-four".