57021225 has 24 divisors (see below), whose sum is σ = 96472992. Its totient is φ = 29702400.

The previous prime is 57021191. The next prime is 57021227. The reversal of 57021225 is 52212075.

It is not a de Polignac number, because 57021225 - 2⁶ = 57021161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 57021195 and 57021204.

It is not an unprimeable number, because it can be changed into a prime (57021227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5616 + ... + 12065.

It is an arithmetic number, because the mean of its divisors is an integer number (4019708).

Almost surely, 2^57021225 is an apocalyptic number.

It is an amenable number.

57021225 is a deficient number, since it is larger than the sum of its proper divisors (39451767).

57021225 is a wasteful number, since it uses less digits than its factorization.

57021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17737 (or 17732 counting only the distinct ones).

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

The square root of 57021225 is about 7551.2399644032. The cubic root of 57021225 is about 384.8978758760.

The spelling of 57021225 in words is "fifty-seven million, twenty-one thousand, two hundred twenty-five".