31314911 has 2 divisors, whose sum is σ = 31314912. Its totient is φ = 31314910.

The previous prime is 31314887. The next prime is 31314919. The reversal of 31314911 is 11941313.

It is a strong prime.

It is an emirp because it is prime and its reverse (11941313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31314911 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31314919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657455 + 15657456.

It is an arithmetic number, because the mean of its divisors is an integer number (15657456).

Almost surely, 2^31314911 is an apocalyptic number.

31314911 is a deficient number, since it is larger than the sum of its proper divisors (1).

31314911 is an equidigital number, since it uses as much as digits as its factorization.

31314911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 23.

The square root of 31314911 is about 5595.9727483254. The cubic root of 31314911 is about 315.1981989416.

The spelling of 31314911 in words is "thirty-one million, three hundred fourteen thousand, nine hundred eleven".