31242566040 has 64 divisors (see below), whose sum is σ = 107117372160. Its totient is φ = 7141157760.

The previous prime is 31242566023. The next prime is 31242566053. The reversal of 31242566040 is 4066524213.

It is a super-2 number, since 2×31242566040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31242565992 and 31242566010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18595926 + ... + 18597605.

It is an arithmetic number, because the mean of its divisors is an integer number (1673708940).

Almost surely, 2^31242566040 is an apocalyptic number.

31242566040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31242566040 is an abundant number, since it is smaller than the sum of its proper divisors (75874806120).

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

31242566040 is a wasteful number, since it uses less digits than its factorization.

31242566040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37193552 (or 37193548 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 31242566040 in words is "thirty-one billion, two hundred forty-two million, five hundred sixty-six thousand, forty".