2224257221 has 4 divisors (see below), whose sum is σ = 2254726572. Its totient is φ = 2193787872.

The previous prime is 2224257199. The next prime is 2224257229. The reversal of 2224257221 is 1227524222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 727650625 + 1496606596 = 26975^2 + 38686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2224257221 - 2¹⁰ = 2224256197 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 (2224257229) 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, 15234566 + ... + 15234711.

It is an arithmetic number, because the mean of its divisors is an integer number (563681643).

Almost surely, 2^2224257221 is an apocalyptic number.

It is an amenable number.

2224257221 is a deficient number, since it is larger than the sum of its proper divisors (30469351).

2224257221 is an equidigital number, since it uses as much as digits as its factorization.

2224257221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30469350.

The product of its digits is 8960, while the sum is 29.

The square root of 2224257221 is about 47162.0315614160. The cubic root of 2224257221 is about 1305.3540964022.

The spelling of 2224257221 in words is "two billion, two hundred twenty-four million, two hundred fifty-seven thousand, two hundred twenty-one".