22144405 has 16 divisors (see below), whose sum is σ = 28111680. Its totient is φ = 16699392.

The previous prime is 22144393. The next prime is 22144427. The reversal of 22144405 is 50444122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22144405 - 2¹⁵ = 22111637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23962 + ... + 24868.

It is an arithmetic number, because the mean of its divisors is an integer number (1756980).

Almost surely, 2^22144405 is an apocalyptic number.

It is an amenable number.

22144405 is a deficient number, since it is larger than the sum of its proper divisors (5967275).

22144405 is a wasteful number, since it uses less digits than its factorization.

22144405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 22144405 is about 4705.7842066971. The cubic root of 22144405 is about 280.8156700278.

Adding to 22144405 its reverse (50444122), we get a palindrome (72588527).

The spelling of 22144405 in words is "twenty-two million, one hundred forty-four thousand, four hundred five".