57025221 has 16 divisors (see below), whose sum is σ = 83136000. Its totient is φ = 34481520.

The previous prime is 57025207. The next prime is 57025249. The reversal of 57025221 is 12252075.

It is a de Polignac number, because none of the positive numbers 2^k-57025221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57025191 and 57025200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57025121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14736 + ... + 18198.

It is an arithmetic number, because the mean of its divisors is an integer number (5196000).

Almost surely, 2^57025221 is an apocalyptic number.

It is an amenable number.

57025221 is a deficient number, since it is larger than the sum of its proper divisors (26110779).

57025221 is a wasteful number, since it uses less digits than its factorization.

57025221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 57025221 is about 7551.5045520744. The cubic root of 57025221 is about 384.9068667736.

Adding to 57025221 its reverse (12252075), we get a palindrome (69277296).

The spelling of 57025221 in words is "fifty-seven million, twenty-five thousand, two hundred twenty-one".