57652021 has 4 divisors (see below), whose sum is σ = 65888032. Its totient is φ = 49416012.

The previous prime is 57652009. The next prime is 57652043. The reversal of 57652021 is 12025675.

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 57652021 - 2⁹ = 57651509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57658021) 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 3 ways as a sum of consecutive naturals, for example, 4117995 + ... + 4118008.

It is an arithmetic number, because the mean of its divisors is an integer number (16472008).

Almost surely, 2^57652021 is an apocalyptic number.

It is an amenable number.

57652021 is a deficient number, since it is larger than the sum of its proper divisors (8236011).

57652021 is an equidigital number, since it uses as much as digits as its factorization.

57652021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8236010.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 57652021 is about 7592.8927952395. The cubic root of 57652021 is about 386.3119821074.

Adding to 57652021 its reverse (12025675), we get a palindrome (69677696).

The spelling of 57652021 in words is "fifty-seven million, six hundred fifty-two thousand, twenty-one".