31367313 has 6 divisors (see below), whose sum is σ = 45308354. Its totient is φ = 20911536.

The previous prime is 31367293. The next prime is 31367327. The reversal of 31367313 is 31376313.

It can be written as a sum of positive squares in only one way, i.e., 22439169 + 8928144 = 4737^2 + 2988^2 .

It is not a de Polignac number, because 31367313 - 2⁹ = 31366801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31367333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1742620 + ... + 1742637.

Almost surely, 2^31367313 is an apocalyptic number.

It is an amenable number.

31367313 is a deficient number, since it is larger than the sum of its proper divisors (13941041).

31367313 is a wasteful number, since it uses less digits than its factorization.

31367313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485263 (or 3485260 counting only the distinct ones).

The product of its digits is 3402, while the sum is 27.

The square root of 31367313 is about 5600.6529083670. The cubic root of 31367313 is about 315.3739172701.

The spelling of 31367313 in words is "thirty-one million, three hundred sixty-seven thousand, three hundred thirteen".