57026221 has 4 divisors (see below), whose sum is σ = 65172832. Its totient is φ = 48879612.

The previous prime is 57026197. The next prime is 57026231. The reversal of 57026221 is 12262075.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57026221 - 2²³ = 48637613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57026231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4073295 + ... + 4073308.

It is an arithmetic number, because the mean of its divisors is an integer number (16293208).

Almost surely, 2^57026221 is an apocalyptic number.

It is an amenable number.

57026221 is a deficient number, since it is larger than the sum of its proper divisors (8146611).

57026221 is an equidigital number, since it uses as much as digits as its factorization.

57026221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146610.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 57026221 is about 7551.5707637550. The cubic root of 57026221 is about 384.9091166823.

Adding to 57026221 its reverse (12262075), we get a palindrome (69288296).

The spelling of 57026221 in words is "fifty-seven million, twenty-six thousand, two hundred twenty-one".