22043899 has 4 divisors (see below), whose sum is σ = 22184464. Its totient is φ = 21903336.

The previous prime is 22043891. The next prime is 22043909. The reversal of 22043899 is 99834022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99834022 = 2 ⋅49917011.

It is a cyclic number.

It is not a de Polignac number, because 22043899 - 2³ = 22043891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22043891) 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, 70047 + ... + 70360.

It is an arithmetic number, because the mean of its divisors is an integer number (5546116).

Almost surely, 2^22043899 is an apocalyptic number.

22043899 is a deficient number, since it is larger than the sum of its proper divisors (140565).

22043899 is a wasteful number, since it uses less digits than its factorization.

22043899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140564.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 22043899 is about 4695.0930768197. The cubic root of 22043899 is about 280.3901830639.

The spelling of 22043899 in words is "twenty-two million, forty-three thousand, eight hundred ninety-nine".