31475982 has 8 divisors (see below), whose sum is σ = 62951976. Its totient is φ = 10491992.

The previous prime is 31475963. The next prime is 31476013. The reversal of 31475982 is 28957413.

It is a sphenic number, since it is the product of 3 distinct primes.

31475982 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 31475982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2622993 + ... + 2623004.

It is an arithmetic number, because the mean of its divisors is an integer number (7868997).

Almost surely, 2^31475982 is an apocalyptic number.

31475982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31475982 is a wasteful number, since it uses less digits than its factorization.

31475982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246002.

The product of its digits is 60480, while the sum is 39.

The square root of 31475982 is about 5610.3459786363. The cubic root of 31475982 is about 315.7376915767.

Subtracting from 31475982 its reverse (28957413), we obtain a square (2518569 = 1587²).

The spelling of 31475982 in words is "thirty-one million, four hundred seventy-five thousand, nine hundred eighty-two".