31988242 has 16 divisors (see below), whose sum is σ = 56371392. Its totient is φ = 13421520.

The previous prime is 31988221. The next prime is 31988251. The reversal of 31988242 is 24288913.

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, 55638 + ... + 56209.

It is an arithmetic number, because the mean of its divisors is an integer number (3523212).

Almost surely, 2^31988242 is an apocalyptic number.

31988242 is a deficient number, since it is larger than the sum of its proper divisors (24383150).

31988242 is a wasteful number, since it uses less digits than its factorization.

31988242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111873.

The product of its digits is 27648, while the sum is 37.

The square root of 31988242 is about 5655.8148838165. The cubic root of 31988242 is about 317.4413209185.

The spelling of 31988242 in words is "thirty-one million, nine hundred eighty-eight thousand, two hundred forty-two".