31000513504 has 24 divisors (see below), whose sum is σ = 61177257288. Its totient is φ = 15463432320.

The previous prime is 31000513493. The next prime is 31000513507. The reversal of 31000513504 is 40531500013.

It is a happy number.

It is a super-2 number, since 2×31000513504² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000513507) 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 3 ways as a sum of consecutive naturals, for example, 1137082 + ... + 1164025.

It is an arithmetic number, because the mean of its divisors is an integer number (2549052387).

Almost surely, 2^31000513504 is an apocalyptic number.

It is an amenable number.

31000513504 is a deficient number, since it is larger than the sum of its proper divisors (30176743784).

31000513504 is a wasteful number, since it uses less digits than its factorization.

31000513504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301538 (or 2301530 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The spelling of 31000513504 in words is "thirty-one billion, five hundred thirteen thousand, five hundred four".