31172053553 has 18 divisors (see below), whose sum is σ = 33440833986. Its totient is φ = 29049008128.

The previous prime is 31172053547. The next prime is 31172053567. The reversal of 31172053553 is 35535027113.

It can be written as a sum of positive squares in 9 ways, for example, as 344770624 + 30827282929 = 18568^2 + 175577^2 .

It is not a de Polignac number, because 31172053553 - 2³⁰ = 30098311729 is a prime.

It is a super-2 number, since 2×31172053553² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31172053753) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31905401 + ... + 31906377.

Almost surely, 2^31172053553 is an apocalyptic number.

It is an amenable number.

31172053553 is a deficient number, since it is larger than the sum of its proper divisors (2268780433).

31172053553 is an frugal number, since it uses more digits than its factorization.

31172053553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 35.

The spelling of 31172053553 in words is "thirty-one billion, one hundred seventy-two million, fifty-three thousand, five hundred fifty-three".