22122219 has 16 divisors (see below), whose sum is σ = 35693568. Its totient is φ = 11897472.

The previous prime is 22122203. The next prime is 22122223. The reversal of 22122219 is 91222122.

It is a happy number.

It is not a de Polignac number, because 22122219 - 2⁴ = 22122203 is a prime.

It is a super-2 number, since 2×22122219² = 978785146967922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 22122195 and 22122204.

It is not an unprimeable number, because it can be changed into a prime (22122259) 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, 30627 + ... + 31340.

It is an arithmetic number, because the mean of its divisors is an integer number (2230848).

Almost surely, 2^22122219 is an apocalyptic number.

22122219 is a deficient number, since it is larger than the sum of its proper divisors (13571349).

22122219 is a wasteful number, since it uses less digits than its factorization.

22122219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61994.

The product of its digits is 288, while the sum is 21.

The square root of 22122219 is about 4703.4263043020. The cubic root of 22122219 is about 280.7218576443.

The spelling of 22122219 in words is "twenty-two million, one hundred twenty-two thousand, two hundred nineteen".