31371500842 has 12 divisors (see below), whose sum is σ = 51724086498. Its totient is φ = 14259773000.

The previous prime is 31371500833. The next prime is 31371500843. The reversal of 31371500842 is 24800517313.

It can be written as a sum of positive squares in only one way, i.e., 18160527121 + 13210973721 = 134761^2 + 114939^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31371500798 and 31371500807.

It is not an unprimeable number, because it can be changed into a prime (31371500843) 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 5 ways as a sum of consecutive naturals, for example, 64816909 + ... + 64817392.

Almost surely, 2^31371500842 is an apocalyptic number.

31371500842 is a deficient number, since it is larger than the sum of its proper divisors (20352585656).

31371500842 is a wasteful number, since it uses less digits than its factorization.

31371500842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129634325 (or 129634314 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 31371500842 in words is "thirty-one billion, three hundred seventy-one million, five hundred thousand, eight hundred forty-two".