31431479545 has 32 divisors (see below), whose sum is σ = 39529949184. Its totient is φ = 23962713600.

The previous prime is 31431479533. The next prime is 31431479561. The reversal of 31431479545 is 54597413413.

It is not a de Polignac number, because 31431479545 - 2⁹ = 31431479033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31431479495 and 31431479504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16429509 + ... + 16431421.

It is an arithmetic number, because the mean of its divisors is an integer number (1235310912).

Almost surely, 2^31431479545 is an apocalyptic number.

It is an amenable number.

31431479545 is a deficient number, since it is larger than the sum of its proper divisors (8098469639).

31431479545 is a wasteful number, since it uses less digits than its factorization.

31431479545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513.

The product of its digits is 907200, while the sum is 46.

The spelling of 31431479545 in words is "thirty-one billion, four hundred thirty-one million, four hundred seventy-nine thousand, five hundred forty-five".