22144146 has 8 divisors (see below), whose sum is σ = 44288304. Its totient is φ = 7381380.

The previous prime is 22144117. The next prime is 22144169. The reversal of 22144146 is 64144122.

It is a happy number.

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

22144146 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845340 + ... + 1845351.

It is an arithmetic number, because the mean of its divisors is an integer number (5536038).

Almost surely, 2^22144146 is an apocalyptic number.

22144146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22144146 is a wasteful number, since it uses less digits than its factorization.

22144146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690696.

The product of its digits is 1536, while the sum is 24.

The square root of 22144146 is about 4705.7566872927. The cubic root of 22144146 is about 280.8145752209.

Subtracting from 22144146 its sum of digits (24), we obtain a palindrome (22144122).

Adding to 22144146 its reverse (64144122), we get a palindrome (86288268).

The spelling of 22144146 in words is "twenty-two million, one hundred forty-four thousand, one hundred forty-six".