31679242 has 16 divisors (see below), whose sum is σ = 54384192. Its totient is φ = 13557600.

The previous prime is 31679239. The next prime is 31679243. The reversal of 31679242 is 24297613.

It is a junction number, because it is equal to n+sod(n) for n = 31679198 and 31679207.

It is not an unprimeable number, because it can be changed into a prime (31679243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13638 + ... + 15790.

It is an arithmetic number, because the mean of its divisors is an integer number (3399012).

Almost surely, 2^31679242 is an apocalyptic number.

31679242 is a deficient number, since it is larger than the sum of its proper divisors (22704950).

31679242 is a wasteful number, since it uses less digits than its factorization.

31679242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213.

The product of its digits is 18144, while the sum is 34.

The square root of 31679242 is about 5628.4315754924. The cubic root of 31679242 is about 316.4158720953.

The spelling of 31679242 in words is "thirty-one million, six hundred seventy-nine thousand, two hundred forty-two".