22897229 has 4 divisors (see below), whose sum is σ = 23455740. Its totient is φ = 22338720.

The previous prime is 22897207. The next prime is 22897241. The reversal of 22897229 is 92279822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92279822 = 2 ⋅46139911.

It can be written as a sum of positive squares in 2 ways, for example, as 5299204 + 17598025 = 2302^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 22897229 - 2²⁰ = 21848653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 558469 = 22897229 / (2 + 2 + 8 + 9 + 7 + 2 + 2 + 9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22897289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279194 + ... + 279275.

It is an arithmetic number, because the mean of its divisors is an integer number (5863935).

Almost surely, 2^22897229 is an apocalyptic number.

It is an amenable number.

22897229 is a deficient number, since it is larger than the sum of its proper divisors (558511).

22897229 is an equidigital number, since it uses as much as digits as its factorization.

22897229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558510.

The product of its digits is 72576, while the sum is 41.

The square root of 22897229 is about 4785.1049100307. The cubic root of 22897229 is about 283.9624900867.

The spelling of 22897229 in words is "twenty-two million, eight hundred ninety-seven thousand, two hundred twenty-nine".