57218058257 has 2 divisors, whose sum is σ = 57218058258. Its totient is φ = 57218058256.

The previous prime is 57218058253. The next prime is 57218058299. The reversal of 57218058257 is 75285081275.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56861263936 + 356794321 = 238456^2 + 18889^2 .

It is a cyclic number.

It is not a de Polignac number, because 57218058257 - 2² = 57218058253 is a prime.

It is not a weakly prime, because it can be changed into another prime (57218058253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28609029128 + 28609029129.

It is an arithmetic number, because the mean of its divisors is an integer number (28609029129).

Almost surely, 2^57218058257 is an apocalyptic number.

It is an amenable number.

57218058257 is a deficient number, since it is larger than the sum of its proper divisors (1).

57218058257 is an equidigital number, since it uses as much as digits as its factorization.

57218058257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568000, while the sum is 50.

The spelling of 57218058257 in words is "fifty-seven billion, two hundred eighteen million, fifty-eight thousand, two hundred fifty-seven".