52572821 has 4 divisors (see below), whose sum is σ = 60083232. Its totient is φ = 45062412.

The previous prime is 52572811. The next prime is 52572833. The reversal of 52572821 is 12827525.

It is a happy number.

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 52572821 - 2¹⁰ = 52571797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52572811) 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 3 ways as a sum of consecutive naturals, for example, 3755195 + ... + 3755208.

It is an arithmetic number, because the mean of its divisors is an integer number (15020808).

Almost surely, 2^52572821 is an apocalyptic number.

It is an amenable number.

52572821 is a deficient number, since it is larger than the sum of its proper divisors (7510411).

52572821 is an equidigital number, since it uses as much as digits as its factorization.

52572821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7510410.

The product of its digits is 11200, while the sum is 32.

The square root of 52572821 is about 7250.7117581655. The cubic root of 52572821 is about 374.6166654644.

The spelling of 52572821 in words is "fifty-two million, five hundred seventy-two thousand, eight hundred twenty-one".