57202681 has 2 divisors, whose sum is σ = 57202682. Its totient is φ = 57202680.

The previous prime is 57202661. The next prime is 57202699. The reversal of 57202681 is 18620275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53890281 + 3312400 = 7341^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 57202681 - 2¹⁵ = 57169913 is a prime.

It is a super-2 number, since 2×57202681² = 6544293427175522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57202631) 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, 28601340 + 28601341.

It is an arithmetic number, because the mean of its divisors is an integer number (28601341).

Almost surely, 2^57202681 is an apocalyptic number.

It is an amenable number.

57202681 is a deficient number, since it is larger than the sum of its proper divisors (1).

57202681 is an equidigital number, since it uses as much as digits as its factorization.

57202681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 57202681 is about 7563.2454012811. The cubic root of 57202681 is about 385.3057244427.

The spelling of 57202681 in words is "fifty-seven million, two hundred two thousand, six hundred eighty-one".