31995442 has 8 divisors (see below), whose sum is σ = 48019356. Its totient is φ = 15988992.

The previous prime is 31995367. The next prime is 31995443. The reversal of 31995442 is 24459913.

It can be written as a sum of positive squares in 2 ways, for example, as 28419561 + 3575881 = 5331^2 + 1891^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31995443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2178 + ... + 8290.

Almost surely, 2^31995442 is an apocalyptic number.

31995442 is a deficient number, since it is larger than the sum of its proper divisors (16023914).

31995442 is a wasteful number, since it uses less digits than its factorization.

31995442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732.

The product of its digits is 38880, while the sum is 37.

The square root of 31995442 is about 5656.4513610567. The cubic root of 31995442 is about 317.4651359821.

The spelling of 31995442 in words is "thirty-one million, nine hundred ninety-five thousand, four hundred forty-two".