22199123 has 4 divisors (see below), whose sum is σ = 22964640. Its totient is φ = 21433608.

The previous prime is 22199119. The next prime is 22199147. The reversal of 22199123 is 32199122.

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 22199123 - 2² = 22199119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 765487 = 22199123 / (2 + 2 + 1 + 9 + 9 + 1 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22195123) 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, 382715 + ... + 382772.

It is an arithmetic number, because the mean of its divisors is an integer number (5741160).

Almost surely, 2^22199123 is an apocalyptic number.

22199123 is a deficient number, since it is larger than the sum of its proper divisors (765517).

22199123 is an equidigital number, since it uses as much as digits as its factorization.

22199123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765516.

The product of its digits is 1944, while the sum is 29.

The square root of 22199123 is about 4711.5945283948. The cubic root of 22199123 is about 281.0467748024.

Subtracting 22199123 from its reverse (32199122), we obtain a palindrome (9999999).

It can be divided in two parts, 22199 and 123, that added together give a palindrome (22322).

The spelling of 22199123 in words is "twenty-two million, one hundred ninety-nine thousand, one hundred twenty-three".