2381431216931 has 12 divisors (see below), whose sum is σ = 2635805611152. Its totient is φ = 2138832178848.

The previous prime is 2381431216877. The next prime is 2381431216943. The reversal of 2381431216931 is 1396121341832.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2381431216931 is a prime.

It is a super-2 number, since 2×2381431216931² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2381431216951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66887615 + ... + 66923208.

It is an arithmetic number, because the mean of its divisors is an integer number (219650467596).

Almost surely, 2^{2381431216931} is an apocalyptic number.

2381431216931 is a deficient number, since it is larger than the sum of its proper divisors (254374394221).

2381431216931 is a wasteful number, since it uses less digits than its factorization.

2381431216931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133810910 (or 133810873 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The spelling of 2381431216931 in words is "two trillion, three hundred eighty-one billion, four hundred thirty-one million, two hundred sixteen thousand, nine hundred thirty-one".