222232221 has 32 divisors (see below), whose sum is σ = 336587520. Its totient is φ = 144882432.

The previous prime is 222232193. The next prime is 222232229. The reversal of 222232221 is 122232222.

It is not a de Polignac number, because 222232221 - 2¹³ = 222224029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222232194 and 222232203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222232229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269616 + ... + 270438.

It is an arithmetic number, because the mean of its divisors is an integer number (10518360).

Almost surely, 2^222232221 is an apocalyptic number.

It is an amenable number.

222232221 is a deficient number, since it is larger than the sum of its proper divisors (114355299).

222232221 is a wasteful number, since it uses less digits than its factorization.

222232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1036 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 222232221 is about 14907.4552154283. The cubic root of 222232221 is about 605.7159486336.

Adding to 222232221 its reverse (122232222), we get a palindrome (344464443).

Subtracting from 222232221 its reverse (122232222), we obtain a palindrome (99999999).

It can be divided in two parts, 2222 and 32221, that added together give a palindrome (34443).

The spelling of 222232221 in words is "two hundred twenty-two million, two hundred thirty-two thousand, two hundred twenty-one".