57221834081 has 2 divisors, whose sum is σ = 57221834082. Its totient is φ = 57221834080.

The previous prime is 57221834041. The next prime is 57221834083. The reversal of 57221834081 is 18043812275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55215600400 + 2006233681 = 234980^2 + 44791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57221834081 is a prime.

It is a super-2 number, since 2×57221834081² (a number of 22 digits) contains 22 as substring.

Together with 57221834083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57221834083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28610917040 + 28610917041.

It is an arithmetic number, because the mean of its divisors is an integer number (28610917041).

Almost surely, 2^57221834081 is an apocalyptic number.

It is an amenable number.

57221834081 is a deficient number, since it is larger than the sum of its proper divisors (1).

57221834081 is an equidigital number, since it uses as much as digits as its factorization.

57221834081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 57221834081 in words is "fifty-seven billion, two hundred twenty-one million, eight hundred thirty-four thousand, eighty-one".