22129227 has 16 divisors (see below), whose sum is σ = 33156000. Its totient is φ = 14585472.

The previous prime is 22129213. The next prime is 22129273. The reversal of 22129227 is 72292122.

It is not a de Polignac number, because 22129227 - 2¹⁴ = 22112843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22129227.

It is not an unprimeable number, because it can be changed into a prime (22129297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202 + ... + 7007.

It is an arithmetic number, because the mean of its divisors is an integer number (2072250).

Almost surely, 2^22129227 is an apocalyptic number.

22129227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

22129227 is a deficient number, since it is larger than the sum of its proper divisors (11026773).

22129227 is an equidigital number, since it uses as much as digits as its factorization.

22129227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307 (or 9301 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22129227 is about 4704.1712341283. The cubic root of 22129227 is about 280.7514973937.

The spelling of 22129227 in words is "twenty-two million, one hundred twenty-nine thousand, two hundred twenty-seven".