31302113 has 2 divisors, whose sum is σ = 31302114. Its totient is φ = 31302112.

The previous prime is 31302109. The next prime is 31302119. The reversal of 31302113 is 31120313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27793984 + 3508129 = 5272^2 + 1873^2 .

It is a cyclic number.

It is not a de Polignac number, because 31302113 - 2² = 31302109 is a prime.

It is not a weakly prime, because it can be changed into another prime (31302119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651056 + 15651057.

It is an arithmetic number, because the mean of its divisors is an integer number (15651057).

Almost surely, 2^31302113 is an apocalyptic number.

It is an amenable number.

31302113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31302113 is an equidigital number, since it uses as much as digits as its factorization.

31302113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 31302113 is about 5594.8291305455. The cubic root of 31302113 is about 315.1552539453.

Adding to 31302113 its reverse (31120313), we get a palindrome (62422426).

The spelling of 31302113 in words is "thirty-one million, three hundred two thousand, one hundred thirteen".