22119997 has 4 divisors (see below), whose sum is σ = 23081760. Its totient is φ = 21158236.

The previous prime is 22119989. The next prime is 22120031. The reversal of 22119997 is 79991122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79991122 = 2 ⋅39995561.

It is a cyclic number.

It is not a de Polignac number, because 22119997 - 2³ = 22119989 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22119917) 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, 480847 + ... + 480892.

It is an arithmetic number, because the mean of its divisors is an integer number (5770440).

Almost surely, 2^22119997 is an apocalyptic number.

It is an amenable number.

22119997 is a deficient number, since it is larger than the sum of its proper divisors (961763).

22119997 is an equidigital number, since it uses as much as digits as its factorization.

22119997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961762.

The product of its digits is 20412, while the sum is 40.

The square root of 22119997 is about 4703.1900875895. The cubic root of 22119997 is about 280.7124585744.

The spelling of 22119997 in words is "twenty-two million, one hundred nineteen thousand, nine hundred ninety-seven".