223964221 has 4 divisors (see below), whose sum is σ = 241192252. Its totient is φ = 206736192.

The previous prime is 223964207. The next prime is 223964231. The reversal of 223964221 is 122469322.

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 34351321 + 189612900 = 5861^2 + 13770^2 .

It is not a de Polignac number, because 223964221 - 2⁷ = 223964093 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 (223964231) 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, 8613996 + ... + 8614021.

It is an arithmetic number, because the mean of its divisors is an integer number (60298063).

Almost surely, 2^223964221 is an apocalyptic number.

It is an amenable number.

223964221 is a deficient number, since it is larger than the sum of its proper divisors (17228031).

223964221 is a wasteful number, since it uses less digits than its factorization.

223964221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17228030.

The product of its digits is 10368, while the sum is 31.

The square root of 223964221 is about 14965.4342068648. The cubic root of 223964221 is about 607.2854574996.

The spelling of 223964221 in words is "two hundred twenty-three million, nine hundred sixty-four thousand, two hundred twenty-one".