57550809 has 4 divisors (see below), whose sum is σ = 76734416. Its totient is φ = 38367204.

The previous prime is 57550793. The next prime is 57550811. The reversal of 57550809 is 90805575.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 57550809 - 2⁴ = 57550793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57550859) 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, 9591799 + ... + 9591804.

It is an arithmetic number, because the mean of its divisors is an integer number (19183604).

Almost surely, 2^57550809 is an apocalyptic number.

It is an amenable number.

57550809 is a deficient number, since it is larger than the sum of its proper divisors (19183607).

57550809 is a wasteful number, since it uses less digits than its factorization.

57550809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19183606.

The product of its (nonzero) digits is 63000, while the sum is 39.

The square root of 57550809 is about 7586.2249505271. The cubic root of 57550809 is about 386.0857841323.

The spelling of 57550809 in words is "fifty-seven million, five hundred fifty thousand, eight hundred nine".