31715113 has 2 divisors, whose sum is σ = 31715114. Its totient is φ = 31715112.

The previous prime is 31715107. The next prime is 31715129. The reversal of 31715113 is 31151713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31663129 + 51984 = 5627^2 + 228^2 .

It is a cyclic number.

It is not a de Polignac number, because 31715113 - 2⁹ = 31714601 is a prime.

It is not a weakly prime, because it can be changed into another prime (31715153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15857556 + 15857557.

It is an arithmetic number, because the mean of its divisors is an integer number (15857557).

Almost surely, 2^31715113 is an apocalyptic number.

It is an amenable number.

31715113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31715113 is an equidigital number, since it uses as much as digits as its factorization.

31715113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 315, while the sum is 22.

The square root of 31715113 is about 5631.6172632735. The cubic root of 31715113 is about 316.5352549228.

Adding to 31715113 its reverse (31151713), we get a palindrome (62866826).

The spelling of 31715113 in words is "thirty-one million, seven hundred fifteen thousand, one hundred thirteen".