57375557 has 2 divisors, whose sum is σ = 57375558. Its totient is φ = 57375556.

The previous prime is 57375473. The next prime is 57375559. The reversal of 57375557 is 75557375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47141956 + 10233601 = 6866^2 + 3199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57375557 is a prime.

Together with 57375559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57375559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28687778 + 28687779.

It is an arithmetic number, because the mean of its divisors is an integer number (28687779).

Almost surely, 2^57375557 is an apocalyptic number.

It is an amenable number.

57375557 is a deficient number, since it is larger than the sum of its proper divisors (1).

57375557 is an equidigital number, since it uses as much as digits as its factorization.

57375557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 643125, while the sum is 44.

The square root of 57375557 is about 7574.6654711611. The cubic root of 57375557 is about 385.6934867026.

The spelling of 57375557 in words is "fifty-seven million, three hundred seventy-five thousand, five hundred fifty-seven".