57355391 has 2 divisors, whose sum is σ = 57355392. Its totient is φ = 57355390.

The previous prime is 57355339. The next prime is 57355423. The reversal of 57355391 is 19355375.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57355391 - 2¹⁸ = 57093247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57355321) 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, 28677695 + 28677696.

It is an arithmetic number, because the mean of its divisors is an integer number (28677696).

Almost surely, 2^57355391 is an apocalyptic number.

57355391 is a deficient number, since it is larger than the sum of its proper divisors (1).

57355391 is an equidigital number, since it uses as much as digits as its factorization.

57355391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70875, while the sum is 38.

The square root of 57355391 is about 7573.3342062793. The cubic root of 57355391 is about 385.6482943671.

The spelling of 57355391 in words is "fifty-seven million, three hundred fifty-five thousand, three hundred ninety-one".