57310391 has 2 divisors, whose sum is σ = 57310392. Its totient is φ = 57310390.

The previous prime is 57310381. The next prime is 57310427. The reversal of 57310391 is 19301375.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57310391 - 2¹⁸ = 57048247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57310301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28655195 + 28655196.

It is an arithmetic number, because the mean of its divisors is an integer number (28655196).

Almost surely, 2^57310391 is an apocalyptic number.

57310391 is a deficient number, since it is larger than the sum of its proper divisors (1).

57310391 is an equidigital number, since it uses as much as digits as its factorization.

57310391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 57310391 is about 7570.3626729504. The cubic root of 57310391 is about 385.5474104251.

The spelling of 57310391 in words is "fifty-seven million, three hundred ten thousand, three hundred ninety-one".