31571870053 has 4 divisors (see below), whose sum is σ = 31577413708. Its totient is φ = 31566326400.

The previous prime is 31571870041. The next prime is 31571870063. The reversal of 31571870053 is 35007817513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13201320609 + 18370549444 = 114897^2 + 135538^2 .

It is a cyclic number.

It is not a de Polignac number, because 31571870053 - 2⁹ = 31571869541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31571869988 and 31571870015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31571870003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2763276 + ... + 2774677.

It is an arithmetic number, because the mean of its divisors is an integer number (7894353427).

Almost surely, 2^31571870053 is an apocalyptic number.

It is an amenable number.

31571870053 is a deficient number, since it is larger than the sum of its proper divisors (5543655).

31571870053 is an equidigital number, since it uses as much as digits as its factorization.

31571870053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543654.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 31571870053 in words is "thirty-one billion, five hundred seventy-one million, eight hundred seventy thousand, fifty-three".