22137899 has 4 divisors (see below), whose sum is σ = 25300464. Its totient is φ = 18975336.

The previous prime is 22137889. The next prime is 22137931. The reversal of 22137899 is 99873122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99873122 = 2 ⋅49936561.

It is a cyclic number.

It is not a de Polignac number, because 22137899 - 2⁴ = 22137883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22137839) 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, 1581272 + ... + 1581285.

It is an arithmetic number, because the mean of its divisors is an integer number (6325116).

Almost surely, 2^22137899 is an apocalyptic number.

22137899 is a deficient number, since it is larger than the sum of its proper divisors (3162565).

22137899 is an equidigital number, since it uses as much as digits as its factorization.

22137899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162564.

The product of its digits is 54432, while the sum is 41.

The square root of 22137899 is about 4705.0928789982. The cubic root of 22137899 is about 280.7881662302.

The spelling of 22137899 in words is "twenty-two million, one hundred thirty-seven thousand, eight hundred ninety-nine".