22145164 has 24 divisors (see below), whose sum is σ = 39417840. Its totient is φ = 10885056.

The previous prime is 22145161. The next prime is 22145209. The reversal of 22145164 is 46154122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22145161) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 112314 + ... + 112510.

It is an arithmetic number, because the mean of its divisors is an integer number (1642410).

Almost surely, 2^22145164 is an apocalyptic number.

It is an amenable number.

22145164 is a deficient number, since it is larger than the sum of its proper divisors (17272676).

22145164 is a wasteful number, since it uses less digits than its factorization.

22145164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 535 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 22145164 is about 4705.8648514380. The cubic root of 22145164 is about 280.8188783124.

Adding to 22145164 its reverse (46154122), we get a palindrome (68299286).

The spelling of 22145164 in words is "twenty-two million, one hundred forty-five thousand, one hundred sixty-four".