22164504 has 40 divisors (see below), whose sum is σ = 57258300. Its totient is φ = 7149840.

The previous prime is 22164503. The next prime is 22164509. The reversal of 22164504 is 40546122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22164503) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 714969 + ... + 714999.

Almost surely, 2^22164504 is an apocalyptic number.

22164504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22164504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28629150).

22164504 is an abundant number, since it is smaller than the sum of its proper divisors (35093796).

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

22164504 is an frugal number, since it uses more digits than its factorization.

22164504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 22164504 is about 4707.9192856293. The cubic root of 22164504 is about 280.9006035572.

Multiplying 22164504 by its sum of digits (24), we get a square (531948096 = 23064²).

22164504 divided by its sum of digits (24) gives a 4-th power (923521 = 31⁴).

The spelling of 22164504 in words is "twenty-two million, one hundred sixty-four thousand, five hundred four".