57021552 has 60 divisors (see below), whose sum is σ = 182381680. Its totient is φ = 16291584.

The previous prime is 57021533. The next prime is 57021557. The reversal of 57021552 is 25512075.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57021557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27277 + ... + 29292.

Almost surely, 2^57021552 is an apocalyptic number.

It is an amenable number.

57021552 is an abundant number, since it is smaller than the sum of its proper divisors (125360128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57021552 is a wasteful number, since it uses less digits than its factorization.

57021552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56590 (or 56581 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 57021552 is about 7551.2616164453. The cubic root of 57021552 is about 384.8986116334.

It can be divided in two parts, 570 and 21552, that added together give a palindrome (22122).

The spelling of 57021552 in words is "fifty-seven million, twenty-one thousand, five hundred fifty-two".