31980475 has 12 divisors (see below), whose sum is σ = 41024160. Its totient is φ = 24701600.

The previous prime is 31980463. The next prime is 31980479. The reversal of 31980475 is 57408913.

It is not a de Polignac number, because 31980475 - 2⁹ = 31979963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31980479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21331 + ... + 22780.

It is an arithmetic number, because the mean of its divisors is an integer number (3418680).

Almost surely, 2^31980475 is an apocalyptic number.

31980475 is a deficient number, since it is larger than the sum of its proper divisors (9043685).

31980475 is a wasteful number, since it uses less digits than its factorization.

31980475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44150 (or 44145 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 31980475 is about 5655.1282036750. The cubic root of 31980475 is about 317.4156264115.

The spelling of 31980475 in words is "thirty-one million, nine hundred eighty thousand, four hundred seventy-five".