57157717 has 2 divisors, whose sum is σ = 57157718. Its totient is φ = 57157716.

The previous prime is 57157703. The next prime is 57157733. The reversal of 57157717 is 71775175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40462321 + 16695396 = 6361^2 + 4086^2 .

It is a cyclic number.

It is not a de Polignac number, because 57157717 - 2⁷ = 57157589 is a prime.

It is a super-2 number, since 2×57157717² = 6534009225304178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57157717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57157787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28578858 + 28578859.

It is an arithmetic number, because the mean of its divisors is an integer number (28578859).

Almost surely, 2^57157717 is an apocalyptic number.

It is an amenable number.

57157717 is a deficient number, since it is larger than the sum of its proper divisors (1).

57157717 is an equidigital number, since it uses as much as digits as its factorization.

57157717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60025, while the sum is 40.

The square root of 57157717 is about 7560.2722834565. The cubic root of 57157717 is about 385.2047418333.

The spelling of 57157717 in words is "fifty-seven million, one hundred fifty-seven thousand, seven hundred seventeen".