202223221 has 4 divisors (see below), whose sum is σ = 202252032. Its totient is φ = 202194412.

The previous prime is 202223209. The next prime is 202223237. The reversal of 202223221 is 122322202.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 202223221 - 2¹⁵ = 202190453 is a prime.

It is a super-2 number, since 2×202223221² = 81788462223229682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202223195 and 202223204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202223921) 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, 3756 + ... + 20458.

It is an arithmetic number, because the mean of its divisors is an integer number (50563008).

Almost surely, 2^202223221 is an apocalyptic number.

It is an amenable number.

202223221 is a deficient number, since it is larger than the sum of its proper divisors (28811).

202223221 is a wasteful number, since it uses less digits than its factorization.

202223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28810.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 202223221 is about 14220.5211226593. The cubic root of 202223221 is about 586.9624802009.

Adding to 202223221 its reverse (122322202), we get a palindrome (324545423).

The spelling of 202223221 in words is "two hundred two million, two hundred twenty-three thousand, two hundred twenty-one".