22199997 has 8 divisors (see below), whose sum is σ = 30288544. Its totient is φ = 14455728.

The previous prime is 22199971. The next prime is 22200001. The reversal of 22199997 is 79999122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22199997 - 2¹⁶ = 22134461 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 (22199797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85918 + ... + 86175.

It is an arithmetic number, because the mean of its divisors is an integer number (3786068).

Almost surely, 2^22199997 is an apocalyptic number.

It is an amenable number.

22199997 is a deficient number, since it is larger than the sum of its proper divisors (8088547).

22199997 is a wasteful number, since it uses less digits than its factorization.

22199997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172139.

The product of its digits is 183708, while the sum is 48.

The square root of 22199997 is about 4711.6872773986. The cubic root of 22199997 is about 281.0504631111.

It can be divided in two parts, 22 and 199997, that multiplied together give a palindrome (4399934).

The spelling of 22199997 in words is "twenty-two million, one hundred ninety-nine thousand, nine hundred ninety-seven".