31504474919 has 16 divisors (see below), whose sum is σ = 34368997248. Its totient is φ = 28763492352.

The previous prime is 31504474879. The next prime is 31504474931. The reversal of 31504474919 is 91947440513.

It is a cyclic number.

It is not a de Polignac number, because 31504474919 - 2²⁰ = 31503426343 is a prime.

It is a super-2 number, since 2×31504474919² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31504474949) 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 15 ways as a sum of consecutive naturals, for example, 84182 + ... + 264755.

It is an arithmetic number, because the mean of its divisors is an integer number (2148062328).

Almost surely, 2^31504474919 is an apocalyptic number.

31504474919 is a deficient number, since it is larger than the sum of its proper divisors (2864522329).

31504474919 is a wasteful number, since it uses less digits than its factorization.

31504474919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349114.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 31504474919 in words is "thirty-one billion, five hundred four million, four hundred seventy-four thousand, nine hundred nineteen".