31691314 has 16 divisors (see below), whose sum is σ = 49282200. Its totient is φ = 15272064.

The previous prime is 31691299. The next prime is 31691321. The reversal of 31691314 is 41319613.

It can be written as a sum of positive squares in 4 ways, for example, as 29539225 + 2152089 = 5435^2 + 1467^2 .

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, 6102 + ... + 10030.

Almost surely, 2^31691314 is an apocalyptic number.

31691314 is a deficient number, since it is larger than the sum of its proper divisors (17590886).

31691314 is a wasteful number, since it uses less digits than its factorization.

31691314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077.

The product of its digits is 1944, while the sum is 28.

The square root of 31691314 is about 5629.5038857789. The cubic root of 31691314 is about 316.4560591607.

The spelling of 31691314 in words is "thirty-one million, six hundred ninety-one thousand, three hundred fourteen".