31103957 has 2 divisors, whose sum is σ = 31103958. Its totient is φ = 31103956.

The previous prime is 31103929. The next prime is 31103993. The reversal of 31103957 is 75930113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20921476 + 10182481 = 4574^2 + 3191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31103957 is a prime.

It is a super-2 number, since 2×31103957² = 1934912282115698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551978 + 15551979.

It is an arithmetic number, because the mean of its divisors is an integer number (15551979).

Almost surely, 2^31103957 is an apocalyptic number.

It is an amenable number.

31103957 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103957 is an equidigital number, since it uses as much as digits as its factorization.

31103957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 31103957 is about 5577.0921634845. The cubic root of 31103957 is about 314.4888223823.

The spelling of 31103957 in words is "thirty-one million, one hundred three thousand, nine hundred fifty-seven".