31916113 has 2 divisors, whose sum is σ = 31916114. Its totient is φ = 31916112.

The previous prime is 31916083. The next prime is 31916117. The reversal of 31916113 is 31161913.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26749584 + 5166529 = 5172^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 31916113 - 2¹³ = 31907921 is a prime.

It is not a weakly prime, because it can be changed into another prime (31916117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15958056 + 15958057.

It is an arithmetic number, because the mean of its divisors is an integer number (15958057).

Almost surely, 2^31916113 is an apocalyptic number.

It is an amenable number.

31916113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31916113 is an equidigital number, since it uses as much as digits as its factorization.

31916113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 25.

The square root of 31916113 is about 5649.4347504861. The cubic root of 31916113 is about 317.2025461393.

The spelling of 31916113 in words is "thirty-one million, nine hundred sixteen thousand, one hundred thirteen".