22122231 has 4 divisors (see below), whose sum is σ = 29496312. Its totient is φ = 14748152.

The previous prime is 22122223. The next prime is 22122241. The reversal of 22122231 is 13222122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22122231 - 2³ = 22122223 is a prime.

It is a super-2 number, since 2×22122231² = 978786208834722, 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 22122231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122241) 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, 3687036 + ... + 3687041.

It is an arithmetic number, because the mean of its divisors is an integer number (7374078).

Almost surely, 2^22122231 is an apocalyptic number.

22122231 is a deficient number, since it is larger than the sum of its proper divisors (7374081).

22122231 is an equidigital number, since it uses as much as digits as its factorization.

22122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7374080.

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

The square root of 22122231 is about 4703.4275799676. The cubic root of 22122231 is about 280.7219084027.

Adding to 22122231 its reverse (13222122), we get a palindrome (35344353).

The spelling of 22122231 in words is "twenty-two million, one hundred twenty-two thousand, two hundred thirty-one".