52304221 has 4 divisors (see below), whose sum is σ = 52387744. Its totient is φ = 52220700.

The previous prime is 52304191. The next prime is 52304293. The reversal of 52304221 is 12240325.

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 a de Polignac number, because none of the positive numbers 2^k-52304221 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 (52304821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40815 + ... + 42076.

It is an arithmetic number, because the mean of its divisors is an integer number (13096936).

Almost surely, 2^52304221 is an apocalyptic number.

It is an amenable number.

52304221 is a deficient number, since it is larger than the sum of its proper divisors (83523).

52304221 is an equidigital number, since it uses as much as digits as its factorization.

52304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83522.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 52304221 is about 7232.1657198933. The cubic root of 52304221 is about 373.9775907150.

Adding to 52304221 its reverse (12240325), we get a palindrome (64544546).

It can be divided in two parts, 52304 and 221, that added together give a palindrome (52525).

The spelling of 52304221 in words is "fifty-two million, three hundred four thousand, two hundred twenty-one".