31314971 has 2 divisors, whose sum is σ = 31314972. Its totient is φ = 31314970.

The previous prime is 31314953. The next prime is 31314977. The reversal of 31314971 is 17941313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31314971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31314977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657485 + 15657486.

It is an arithmetic number, because the mean of its divisors is an integer number (15657486).

Almost surely, 2^31314971 is an apocalyptic number.

31314971 is a deficient number, since it is larger than the sum of its proper divisors (1).

31314971 is an equidigital number, since it uses as much as digits as its factorization.

31314971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 31314971 is about 5595.9781093210. The cubic root of 31314971 is about 315.1984002502.

The spelling of 31314971 in words is "thirty-one million, three hundred fourteen thousand, nine hundred seventy-one".