57200621 has 16 divisors (see below), whose sum is σ = 62821440. Its totient is φ = 51891840.

The previous prime is 57200579. The next prime is 57200629. The reversal of 57200621 is 12600275.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57200621 is a prime.

It is a super-2 number, since 2×57200621² = 6543822085571282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57200629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42641 + ... + 43961.

It is an arithmetic number, because the mean of its divisors is an integer number (3926340).

Almost surely, 2^57200621 is an apocalyptic number.

It is an amenable number.

57200621 is a deficient number, since it is larger than the sum of its proper divisors (5620819).

57200621 is a wasteful number, since it uses less digits than its factorization.

57200621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 57200621 is about 7563.1092151310. The cubic root of 57200621 is about 385.3010991389.

Adding to 57200621 its reverse (12600275), we get a palindrome (69800896).

The spelling of 57200621 in words is "fifty-seven million, two hundred thousand, six hundred twenty-one".