22185144 has 64 divisors (see below), whose sum is σ = 62016000. Its totient is φ = 7348320.

The previous prime is 22185139. The next prime is 22185167. The reversal of 22185144 is 44158122.

It is a super-2 number, since 2×22185144² = 984361228601472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58347 + ... + 58725.

It is an arithmetic number, because the mean of its divisors is an integer number (969000).

Almost surely, 2^22185144 is an apocalyptic number.

22185144 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 22185144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31008000).

22185144 is an abundant number, since it is smaller than the sum of its proper divisors (39830856).

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

22185144 is a wasteful number, since it uses less digits than its factorization.

22185144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 655 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 22185144 is about 4710.1108267216. The cubic root of 22185144 is about 280.9877698016.

The spelling of 22185144 in words is "twenty-two million, one hundred eighty-five thousand, one hundred forty-four".