22212231 has 8 divisors (see below), whose sum is σ = 30637680. Its totient is φ = 14297472.

The previous prime is 22212199. The next prime is 22212233. The reversal of 22212231 is 13221222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22212231 - 2⁵ = 22212199 is a prime.

It is a super-2 number, since 2×22212231² = 986766411994722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22212231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127570 + ... + 127743.

It is an arithmetic number, because the mean of its divisors is an integer number (3829710).

Almost surely, 2^22212231 is an apocalyptic number.

22212231 is a deficient number, since it is larger than the sum of its proper divisors (8425449).

22212231 is a wasteful number, since it uses less digits than its factorization.

22212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255345.

The product of its digits is 96, while the sum is 15.

The square root of 22212231 is about 4712.9853596208. The cubic root of 22212231 is about 281.1020808351.

Adding to 22212231 its reverse (13221222), we get a palindrome (35433453).

The spelling of 22212231 in words is "twenty-two million, two hundred twelve thousand, two hundred thirty-one".