57204261 has 12 divisors (see below), whose sum is σ = 82739488. Its totient is φ = 38084904.

The previous prime is 57204239. The next prime is 57204263. The reversal of 57204261 is 16240275.

It is not a de Polignac number, because 57204261 - 2¹¹ = 57202213 is a prime.

It is a super-2 number, since 2×57204261² = 6544654953112242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57204263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3546 + ... + 11268.

Almost surely, 2^57204261 is an apocalyptic number.

It is an amenable number.

57204261 is a deficient number, since it is larger than the sum of its proper divisors (25535227).

57204261 is a wasteful number, since it uses less digits than its factorization.

57204261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552 (or 8549 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 57204261 is about 7563.3498530744. The cubic root of 57204261 is about 385.3092719305.

The spelling of 57204261 in words is "fifty-seven million, two hundred four thousand, two hundred sixty-one".