22144999 has 4 divisors (see below), whose sum is σ = 23447664. Its totient is φ = 20842336.

The previous prime is 22144979. The next prime is 22145027. The reversal of 22144999 is 99944122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22144999 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 (22144939) 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, 651307 + ... + 651340.

It is an arithmetic number, because the mean of its divisors is an integer number (5861916).

Almost surely, 2^22144999 is an apocalyptic number.

22144999 is a deficient number, since it is larger than the sum of its proper divisors (1302665).

22144999 is a wasteful number, since it uses less digits than its factorization.

22144999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302664.

The product of its digits is 46656, while the sum is 40.

The square root of 22144999 is about 4705.8473200902. The cubic root of 22144999 is about 280.8181808654.

The spelling of 22144999 in words is "twenty-two million, one hundred forty-four thousand, nine hundred ninety-nine".