22719955 has 4 divisors (see below), whose sum is σ = 27263952. Its totient is φ = 18175960.

The previous prime is 22719937. The next prime is 22719959. The reversal of 22719955 is 55991722.

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

It is not a de Polignac number, because 22719955 - 2¹¹ = 22717907 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22719959) 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, 2271991 + ... + 2272000.

It is an arithmetic number, because the mean of its divisors is an integer number (6815988).

Almost surely, 2^22719955 is an apocalyptic number.

22719955 is a deficient number, since it is larger than the sum of its proper divisors (4543997).

22719955 is an equidigital number, since it uses as much as digits as its factorization.

22719955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543996.

The product of its digits is 56700, while the sum is 40.

The square root of 22719955 is about 4766.5453947277. The cubic root of 22719955 is about 283.2277630530.

The spelling of 22719955 in words is "twenty-two million, seven hundred nineteen thousand, nine hundred fifty-five".