31507417404 has 18 divisors (see below), whose sum is σ = 79643749640. Its totient is φ = 10502472456.

The previous prime is 31507417397. The next prime is 31507417421. The reversal of 31507417404 is 40471470513.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 875206039 = 31507417404 / (3 + 1 + 5 + 0 + 7 + 4 + 1 + 7 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 437602984 + ... + 437603055.

Almost surely, 2^31507417404 is an apocalyptic number.

It is an amenable number.

31507417404 is an abundant number, since it is smaller than the sum of its proper divisors (48136332236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31507417404 is a wasteful number, since it uses less digits than its factorization.

31507417404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875206049 (or 875206044 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

Adding to 31507417404 its reverse (40471470513), we get a palindrome (71978887917).

The spelling of 31507417404 in words is "thirty-one billion, five hundred seven million, four hundred seventeen thousand, four hundred four".