57505553 has 4 divisors (see below), whose sum is σ = 65720640. Its totient is φ = 49290468.

The previous prime is 57505541. The next prime is 57505573. The reversal of 57505553 is 35550575.

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 a cyclic number.

It is not a de Polignac number, because 57505553 - 2⁸ = 57505297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57505523) 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, 4107533 + ... + 4107546.

It is an arithmetic number, because the mean of its divisors is an integer number (16430160).

Almost surely, 2^57505553 is an apocalyptic number.

It is an amenable number.

57505553 is a deficient number, since it is larger than the sum of its proper divisors (8215087).

57505553 is an equidigital number, since it uses as much as digits as its factorization.

57505553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8215086.

The product of its (nonzero) digits is 65625, while the sum is 35.

The square root of 57505553 is about 7583.2415891886. The cubic root of 57505553 is about 385.9845560145.

The spelling of 57505553 in words is "fifty-seven million, five hundred five thousand, five hundred fifty-three".