31314457 has 2 divisors, whose sum is σ = 31314458. Its totient is φ = 31314456.

The previous prime is 31314407. The next prime is 31314473. The reversal of 31314457 is 75441313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28955161 + 2359296 = 5381^2 + 1536^2 .

It is a cyclic number.

It is not a de Polignac number, because 31314457 - 2¹¹ = 31312409 is a prime.

It is not a weakly prime, because it can be changed into another prime (31314407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657228 + 15657229.

It is an arithmetic number, because the mean of its divisors is an integer number (15657229).

Almost surely, 2^31314457 is an apocalyptic number.

It is an amenable number.

31314457 is a deficient number, since it is larger than the sum of its proper divisors (1).

31314457 is an equidigital number, since it uses as much as digits as its factorization.

31314457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 31314457 is about 5595.9321832917. The cubic root of 31314457 is about 315.1966756984.

The spelling of 31314457 in words is "thirty-one million, three hundred fourteen thousand, four hundred fifty-seven".