57422021 has 2 divisors, whose sum is σ = 57422022. Its totient is φ = 57422020.

The previous prime is 57421993. The next prime is 57422033. The reversal of 57422021 is 12022475.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 2217121 = 7430^2 + 1489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57422021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57422051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28711010 + 28711011.

It is an arithmetic number, because the mean of its divisors is an integer number (28711011).

Almost surely, 2^57422021 is an apocalyptic number.

It is an amenable number.

57422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

57422021 is an equidigital number, since it uses as much as digits as its factorization.

57422021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 57422021 is about 7577.7319166093. The cubic root of 57422021 is about 385.7975729936.

Adding to 57422021 its reverse (12022475), we get a palindrome (69444496).

The spelling of 57422021 in words is "fifty-seven million, four hundred twenty-two thousand, twenty-one".