31365401 has 2 divisors, whose sum is σ = 31365402. Its totient is φ = 31365400.

The previous prime is 31365379. The next prime is 31365413. The reversal of 31365401 is 10456313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23775376 + 7590025 = 4876^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 31365401 - 2¹⁸ = 31103257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31365421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15682700 + 15682701.

It is an arithmetic number, because the mean of its divisors is an integer number (15682701).

Almost surely, 2^31365401 is an apocalyptic number.

It is an amenable number.

31365401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31365401 is an equidigital number, since it uses as much as digits as its factorization.

31365401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 31365401 is about 5600.4822113814. The cubic root of 31365401 is about 315.3675092493.

The spelling of 31365401 in words is "thirty-one million, three hundred sixty-five thousand, four hundred one".