31388051 has 2 divisors, whose sum is σ = 31388052. Its totient is φ = 31388050.

The previous prime is 31388041. The next prime is 31388053. The reversal of 31388051 is 15088313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31388051 - 2¹⁸ = 31125907 is a prime.

Together with 31388053, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31388053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15694025 + 15694026.

It is an arithmetic number, because the mean of its divisors is an integer number (15694026).

Almost surely, 2^31388051 is an apocalyptic number.

31388051 is a deficient number, since it is larger than the sum of its proper divisors (1).

31388051 is an equidigital number, since it uses as much as digits as its factorization.

31388051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 31388051 is about 5602.5039937514. The cubic root of 31388051 is about 315.4434034419.

The spelling of 31388051 in words is "thirty-one million, three hundred eighty-eight thousand, fifty-one".