31143268 has 24 divisors (see below), whose sum is σ = 59693760. Its totient is φ = 14128800.

The previous prime is 31143257. The next prime is 31143271. The reversal of 31143268 is 86234113.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 2008 + ... + 8143.

It is an arithmetic number, because the mean of its divisors is an integer number (2487240).

Almost surely, 2^31143268 is an apocalyptic number.

It is an amenable number.

31143268 is a deficient number, since it is larger than the sum of its proper divisors (28550492).

31143268 is a wasteful number, since it uses less digits than its factorization.

31143268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10227 (or 10225 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 31143268 is about 5580.6153782535. The cubic root of 31143268 is about 314.6212563943.

The spelling of 31143268 in words is "thirty-one million, one hundred forty-three thousand, two hundred sixty-eight".