31359113 has 2 divisors, whose sum is σ = 31359114. Its totient is φ = 31359112.

The previous prime is 31359109. The next prime is 31359127. The reversal of 31359113 is 31195313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30880249 + 478864 = 5557^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 31359113 - 2² = 31359109 is a prime.

It is not a weakly prime, because it can be changed into another prime (31359103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15679556 + 15679557.

It is an arithmetic number, because the mean of its divisors is an integer number (15679557).

Almost surely, 2^31359113 is an apocalyptic number.

It is an amenable number.

31359113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31359113 is an equidigital number, since it uses as much as digits as its factorization.

31359113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215, while the sum is 26.

The square root of 31359113 is about 5599.9208030114. The cubic root of 31359113 is about 315.3464333359.

The spelling of 31359113 in words is "thirty-one million, three hundred fifty-nine thousand, one hundred thirteen".