57250561 has 4 divisors (see below), whose sum is σ = 57290500. Its totient is φ = 57210624.

The previous prime is 57250549. The next prime is 57250573. The reversal of 57250561 is 16505275.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (57250549) and next prime (57250573).

It can be written as a sum of positive squares in 2 ways, for example, as 4601025 + 52649536 = 2145^2 + 7256^2 .

It is a cyclic number.

It is not a de Polignac number, because 57250561 - 2⁹ = 57250049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57250511) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17736 + ... + 20713.

It is an arithmetic number, because the mean of its divisors is an integer number (14322625).

Almost surely, 2^57250561 is an apocalyptic number.

It is an amenable number.

57250561 is a deficient number, since it is larger than the sum of its proper divisors (39939).

57250561 is a wasteful number, since it uses less digits than its factorization.

57250561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39938.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 57250561 is about 7566.4100470434. The cubic root of 57250561 is about 385.4131978040.

The spelling of 57250561 in words is "fifty-seven million, two hundred fifty thousand, five hundred sixty-one".