31556051431 has 16 divisors (see below), whose sum is σ = 33035587200. Its totient is φ = 30117484800.

The previous prime is 31556051413. The next prime is 31556051473. The reversal of 31556051431 is 13415065513.

It is a de Polignac number, because none of the positive numbers 2^k-31556051431 is a prime.

It is a super-2 number, since 2×31556051431² (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 (31556051531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 308361 + ... + 397741.

It is an arithmetic number, because the mean of its divisors is an integer number (2064724200).

Almost surely, 2^31556051431 is an apocalyptic number.

31556051431 is a deficient number, since it is larger than the sum of its proper divisors (1479535769).

31556051431 is a wasteful number, since it uses less digits than its factorization.

31556051431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89610.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 31556051431 in words is "thirty-one billion, five hundred fifty-six million, fifty-one thousand, four hundred thirty-one".