31055235431 has 4 divisors (see below), whose sum is σ = 33878438664. Its totient is φ = 28232032200.

The previous prime is 31055235413. The next prime is 31055235437. The reversal of 31055235431 is 13453255013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31055235431 is a prime.

It is a super-2 number, since 2×31055235431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31055235437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411601600 + ... + 1411601621.

It is an arithmetic number, because the mean of its divisors is an integer number (8469609666).

Almost surely, 2^31055235431 is an apocalyptic number.

31055235431 is a deficient number, since it is larger than the sum of its proper divisors (2823203233).

31055235431 is a wasteful number, since it uses less digits than its factorization.

31055235431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823203232.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 31055235431 in words is "thirty-one billion, fifty-five million, two hundred thirty-five thousand, four hundred thirty-one".