31245980 has 24 divisors (see below), whose sum is σ = 65724288. Its totient is φ = 12477888.

The previous prime is 31245979. The next prime is 31245997. The reversal of 31245980 is 8954213.

It is a super-2 number, since 2×31245980² = 1952622532320800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19157 + ... + 20723.

It is an arithmetic number, because the mean of its divisors is an integer number (2738512).

Almost surely, 2^31245980 is an apocalyptic number.

It is an amenable number.

31245980 is an abundant number, since it is smaller than the sum of its proper divisors (34478308).

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

31245980 is a wasteful number, since it uses less digits than its factorization.

31245980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573 (or 2571 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 31245980 is about 5589.8103724545. The cubic root of 31245980 is about 314.9667555409.

The spelling of 31245980 in words is "thirty-one million, two hundred forty-five thousand, nine hundred eighty".