22139197 has 4 divisors (see below), whose sum is σ = 22419520. Its totient is φ = 21858876.

The previous prime is 22139191. The next prime is 22139203. The reversal of 22139197 is 79193122.

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.

It is an interprime number because it is at equal distance from previous prime (22139191) and next prime (22139203).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22139197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22139191) 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, 140043 + ... + 140200.

It is an arithmetic number, because the mean of its divisors is an integer number (5604880).

Almost surely, 2^22139197 is an apocalyptic number.

It is an amenable number.

22139197 is a deficient number, since it is larger than the sum of its proper divisors (280323).

22139197 is an equidigital number, since it uses as much as digits as its factorization.

22139197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280322.

The product of its digits is 6804, while the sum is 34.

The square root of 22139197 is about 4705.2308126170. The cubic root of 22139197 is about 280.7936538921.

The spelling of 22139197 in words is "twenty-two million, one hundred thirty-nine thousand, one hundred ninety-seven".