522272221 has 4 divisors (see below), whose sum is σ = 539119744. Its totient is φ = 505424700.

The previous prime is 522272213. The next prime is 522272251. The reversal of 522272221 is 122272225.

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 522272221 - 2³ = 522272213 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 (522272251) 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, 8423715 + ... + 8423776.

It is an arithmetic number, because the mean of its divisors is an integer number (134779936).

Almost surely, 2^522272221 is an apocalyptic number.

It is an amenable number.

522272221 is a deficient number, since it is larger than the sum of its proper divisors (16847523).

522272221 is a wasteful number, since it uses less digits than its factorization.

522272221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16847522.

The product of its digits is 2240, while the sum is 25.

The square root of 522272221 is about 22853.2759358478. The cubic root of 522272221 is about 805.3147289856.

The spelling of 522272221 in words is "five hundred twenty-two million, two hundred seventy-two thousand, two hundred twenty-one".