31255980 has 48 divisors (see below), whose sum is σ = 100020480. Its totient is φ = 7144128.

The previous prime is 31255963. The next prime is 31256021. The reversal of 31255980 is 8955213.

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, 36790 + ... + 37629.

It is an arithmetic number, because the mean of its divisors is an integer number (2083760).

Almost surely, 2^31255980 is an apocalyptic number.

31255980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31255980 is an abundant number, since it is smaller than the sum of its proper divisors (68764500).

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

31255980 is a wasteful number, since it uses less digits than its factorization.

31255980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74438 (or 74436 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 31255980 is about 5590.7047856241. The cubic root of 31255980 is about 315.0003527333. Note that the first 3 decimals are identical.

The spelling of 31255980 in words is "thirty-one million, two hundred fifty-five thousand, nine hundred eighty".