30631681931 has 6 divisors (see below), whose sum is σ = 32539537860. Its totient is φ = 28829818016.

The previous prime is 30631681919. The next prime is 30631681937. The reversal of 30631681931 is 13918613603.

It is not a de Polignac number, because 30631681931 - 2¹⁰ = 30631680907 is a prime.

It is a super-2 number, since 2×30631681931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30631681937) 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, 52995701 + ... + 52996278.

It is an arithmetic number, because the mean of its divisors is an integer number (5423256310).

Almost surely, 2^30631681931 is an apocalyptic number.

30631681931 is a deficient number, since it is larger than the sum of its proper divisors (1907855929).

30631681931 is a wasteful number, since it uses less digits than its factorization.

30631681931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105992013 (or 105991996 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 30631681931 in words is "thirty billion, six hundred thirty-one million, six hundred eighty-one thousand, nine hundred thirty-one".