31545054431 has 16 divisors (see below), whose sum is σ = 36349006848. Its totient is φ = 27106833600.

The previous prime is 31545054427. The next prime is 31545054433. The reversal of 31545054431 is 13445054513.

It is not a de Polignac number, because 31545054431 - 2² = 31545054427 is a prime.

It is a super-2 number, since 2×31545054431² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 31545054391 and 31545054400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31545054433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1061006 + ... + 1090331.

It is an arithmetic number, because the mean of its divisors is an integer number (2271812928).

Almost surely, 2^31545054431 is an apocalyptic number.

31545054431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31545054431 is a deficient number, since it is larger than the sum of its proper divisors (4803952417).

31545054431 is a wasteful number, since it uses less digits than its factorization.

31545054431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151422.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 31545054431 in words is "thirty-one billion, five hundred forty-five million, fifty-four thousand, four hundred thirty-one".