31371313161 has 16 divisors (see below), whose sum is σ = 42375947328. Its totient is φ = 20641752000.

The previous prime is 31371313147. The next prime is 31371313199. The reversal of 31371313161 is 16131317313.

It is not a de Polignac number, because 31371313161 - 2¹⁵ = 31371280393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31371363161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67255 + ... + 259356.

It is an arithmetic number, because the mean of its divisors is an integer number (2648496708).

Almost surely, 2^31371313161 is an apocalyptic number.

It is an amenable number.

31371313161 is a deficient number, since it is larger than the sum of its proper divisors (11004634167).

31371313161 is a wasteful number, since it uses less digits than its factorization.

31371313161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327032.

The product of its digits is 3402, while the sum is 30.

The spelling of 31371313161 in words is "thirty-one billion, three hundred seventy-one million, three hundred thirteen thousand, one hundred sixty-one".