57755221 has 4 divisors (see below), whose sum is σ = 57770944. Its totient is φ = 57739500.

The previous prime is 57755179. The next prime is 57755267. The reversal of 57755221 is 12255775.

57755221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 57755221 - 2¹¹ = 57753173 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 (57755521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916 + ... + 10786.

It is an arithmetic number, because the mean of its divisors is an integer number (14442736).

Almost surely, 2^57755221 is an apocalyptic number.

It is an amenable number.

57755221 is a deficient number, since it is larger than the sum of its proper divisors (15723).

57755221 is an equidigital number, since it uses as much as digits as its factorization.

57755221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15722.

The product of its digits is 24500, while the sum is 34.

The square root of 57755221 is about 7599.6855856016. The cubic root of 57755221 is about 386.5423506257.

The spelling of 57755221 in words is "fifty-seven million, seven hundred fifty-five thousand, two hundred twenty-one".