57522021 has 4 divisors (see below), whose sum is σ = 76696032. Its totient is φ = 38348012.

The previous prime is 57522007. The next prime is 57522041. The reversal of 57522021 is 12022575.

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 57522021 - 2⁹ = 57521509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 57521982 and 57522000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57522041) 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, 9587001 + ... + 9587006.

It is an arithmetic number, because the mean of its divisors is an integer number (19174008).

Almost surely, 2^57522021 is an apocalyptic number.

It is an amenable number.

57522021 is a deficient number, since it is larger than the sum of its proper divisors (19174011).

57522021 is a wasteful number, since it uses less digits than its factorization.

57522021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19174010.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 57522021 is about 7584.3273267970. The cubic root of 57522021 is about 386.0213975986.

Adding to 57522021 its reverse (12022575), we get a palindrome (69544596).

The spelling of 57522021 in words is "fifty-seven million, five hundred twenty-two thousand, twenty-one".