57221425 has 12 divisors (see below), whose sum is σ = 72873436. Its totient is φ = 44539200.

The previous prime is 57221389. The next prime is 57221441. The reversal of 57221425 is 52412275.

It can be written as a sum of positive squares in 6 ways, for example, as 82944 + 57138481 = 288^2 + 7559^2 .

It is not a de Polignac number, because 57221425 - 2¹⁵ = 57188657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57221393 and 57221402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30006 + ... + 31855.

Almost surely, 2^57221425 is an apocalyptic number.

It is an amenable number.

57221425 is a deficient number, since it is larger than the sum of its proper divisors (15652011).

57221425 is a wasteful number, since it uses less digits than its factorization.

57221425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61908 (or 61903 counting only the distinct ones).

The product of its digits is 5600, while the sum is 28.

The square root of 57221425 is about 7564.4844503773. The cubic root of 57221425 is about 385.3478051148.

The spelling of 57221425 in words is "fifty-seven million, two hundred twenty-one thousand, four hundred twenty-five".