52522221 has 8 divisors (see below), whose sum is σ = 71658400. Its totient is φ = 34200432.

The previous prime is 52522207. The next prime is 52522229. The reversal of 52522221 is 12222525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52522221 - 2⁶ = 52522157 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 (52522229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203446 + ... + 203703.

It is an arithmetic number, because the mean of its divisors is an integer number (8957300).

Almost surely, 2^52522221 is an apocalyptic number.

It is an amenable number.

52522221 is a deficient number, since it is larger than the sum of its proper divisors (19136179).

52522221 is a wasteful number, since it uses less digits than its factorization.

52522221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407195.

The product of its digits is 800, while the sum is 21.

The square root of 52522221 is about 7247.2216055534. The cubic root of 52522221 is about 374.4964405548.

Adding to 52522221 its reverse (12222525), we get a palindrome (64744746).

The spelling of 52522221 in words is "fifty-two million, five hundred twenty-two thousand, two hundred twenty-one".