57245509 has 4 divisors (see below), whose sum is σ = 57428716. Its totient is φ = 57062304.

The previous prime is 57245501. The next prime is 57245521. The reversal of 57245509 is 90554275.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8105409 + 49140100 = 2847^2 + 7010^2 .

It is a cyclic number.

It is not a de Polignac number, because 57245509 - 2³ = 57245501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57245501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91134 + ... + 91759.

It is an arithmetic number, because the mean of its divisors is an integer number (14357179).

Almost surely, 2^57245509 is an apocalyptic number.

It is an amenable number.

57245509 is a deficient number, since it is larger than the sum of its proper divisors (183207).

57245509 is a wasteful number, since it uses less digits than its factorization.

57245509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183206.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 57245509 is about 7566.0761957570. The cubic root of 57245509 is about 385.4018607113.

The spelling of 57245509 in words is "fifty-seven million, two hundred forty-five thousand, five hundred nine".