57211897 has 2 divisors, whose sum is σ = 57211898. Its totient is φ = 57211896.

The previous prime is 57211883. The next prime is 57211909. The reversal of 57211897 is 79811275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38987536 + 18224361 = 6244^2 + 4269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57211897 is a prime.

It is not a weakly prime, because it can be changed into another prime (57211807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28605948 + 28605949.

It is an arithmetic number, because the mean of its divisors is an integer number (28605949).

Almost surely, 2^57211897 is an apocalyptic number.

It is an amenable number.

57211897 is a deficient number, since it is larger than the sum of its proper divisors (1).

57211897 is an equidigital number, since it uses as much as digits as its factorization.

57211897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 40.

The square root of 57211897 is about 7563.8546390052. The cubic root of 57211897 is about 385.3264157040.

The spelling of 57211897 in words is "fifty-seven million, two hundred eleven thousand, eight hundred ninety-seven".