22231229 has 4 divisors (see below), whose sum is σ = 22326876. Its totient is φ = 22135584.

The previous prime is 22231219. The next prime is 22231241. The reversal of 22231229 is 92213222.

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 4507129 + 17724100 = 2123^2 + 4210^2 .

It is a cyclic number.

It is not a de Polignac number, because 22231229 - 2¹² = 22227133 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 (22231219) 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, 47474 + ... + 47939.

It is an arithmetic number, because the mean of its divisors is an integer number (5581719).

Almost surely, 2^22231229 is an apocalyptic number.

It is an amenable number.

22231229 is a deficient number, since it is larger than the sum of its proper divisors (95647).

22231229 is an equidigital number, since it uses as much as digits as its factorization.

22231229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95646.

The product of its digits is 864, while the sum is 23.

The square root of 22231229 is about 4715.0004241781. Note that the first 3 decimals coincide. The cubic root of 22231229 is about 281.1821996898.

The spelling of 22231229 in words is "twenty-two million, two hundred thirty-one thousand, two hundred twenty-nine".