57505521 has 8 divisors (see below), whose sum is σ = 79318080. Its totient is φ = 37014992.

The previous prime is 57505499. The next prime is 57505523. The reversal of 57505521 is 12550575.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57505521 - 2⁹ = 57505009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57505523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330405 + ... + 330578.

It is an arithmetic number, because the mean of its divisors is an integer number (9914760).

Almost surely, 2^57505521 is an apocalyptic number.

It is an amenable number.

57505521 is a deficient number, since it is larger than the sum of its proper divisors (21812559).

57505521 is a wasteful number, since it uses less digits than its factorization.

57505521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661015.

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 57505521 is about 7583.2394792727. The cubic root of 57505521 is about 385.9844844185.

It can be divided in two parts, 575055 and 21, that multiplied together give a triangular number (12076155 = T₄₉₁₄).

The spelling of 57505521 in words is "fifty-seven million, five hundred five thousand, five hundred twenty-one".