31042392681 has 32 divisors (see below), whose sum is σ = 43749365760. Its totient is φ = 19539273600.

The previous prime is 31042392629. The next prime is 31042392737. The reversal of 31042392681 is 18629324013.

It is not a de Polignac number, because 31042392681 - 2⁶ = 31042392617 is a prime.

It is a super-2 number, since 2×31042392681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31042392611) 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 31 ways as a sum of consecutive naturals, for example, 3870966 + ... + 3878976.

It is an arithmetic number, because the mean of its divisors is an integer number (1367167680).

Almost surely, 2^31042392681 is an apocalyptic number.

It is an amenable number.

31042392681 is a deficient number, since it is larger than the sum of its proper divisors (12706973079).

31042392681 is a wasteful number, since it uses less digits than its factorization.

31042392681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8757.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 31042392681 in words is "thirty-one billion, forty-two million, three hundred ninety-two thousand, six hundred eighty-one".