52684221 has 24 divisors (see below), whose sum is σ = 74543872. Its totient is φ = 33062400.

The previous prime is 52684211. The next prime is 52684223. The reversal of 52684221 is 12248625.

It is not a de Polignac number, because 52684221 - 2⁶ = 52684157 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52684223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156165 + ... + 156501.

Almost surely, 2^52684221 is an apocalyptic number.

It is an amenable number.

52684221 is a deficient number, since it is larger than the sum of its proper divisors (21859651).

52684221 is a wasteful number, since it uses less digits than its factorization.

52684221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 412 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 52684221 is about 7258.3896974467. The cubic root of 52684221 is about 374.8810787357.

The spelling of 52684221 in words is "fifty-two million, six hundred eighty-four thousand, two hundred twenty-one".