931216423491 has 12 divisors (see below), whose sum is σ = 1345099651168. Its totient is φ = 620806674384.

The previous prime is 931216423483. The next prime is 931216423493. The reversal of 931216423491 is 194324612139.

931216423491 is a `hidden beast` number, since 9 + 3 + 1 + 216 + 423 + 4 + 9 + 1 = 666.

931216423491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 931216423491 - 2³ = 931216423483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (931216423493) 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, 1573926 + ... + 2083188.

Almost surely, 2^931216423491 is an apocalyptic number.

931216423491 is a deficient number, since it is larger than the sum of its proper divisors (413883227677).

931216423491 is a wasteful number, since it uses less digits than its factorization.

931216423491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712442 (or 712439 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The spelling of 931216423491 in words is "nine hundred thirty-one billion, two hundred sixteen million, four hundred twenty-three thousand, four hundred ninety-one".