57424430221 has 2 divisors, whose sum is σ = 57424430222. Its totient is φ = 57424430220.

The previous prime is 57424430207. The next prime is 57424430309. The reversal of 57424430221 is 12203442475.

57424430221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51762620196 + 5661810025 = 227514^2 + 75245^2 .

It is a cyclic number.

It is not a de Polignac number, because 57424430221 - 2¹⁹ = 57423905933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57424430321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28712215110 + 28712215111.

It is an arithmetic number, because the mean of its divisors is an integer number (28712215111).

Almost surely, 2^57424430221 is an apocalyptic number.

It is an amenable number.

57424430221 is a deficient number, since it is larger than the sum of its proper divisors (1).

57424430221 is an equidigital number, since it uses as much as digits as its factorization.

57424430221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 34.

Adding to 57424430221 its reverse (12203442475), we get a palindrome (69627872696).

The spelling of 57424430221 in words is "fifty-seven billion, four hundred twenty-four million, four hundred thirty thousand, two hundred twenty-one".