22551804 has 96 divisors (see below), whose sum is σ = 65479680. Its totient is φ = 6652800.

The previous prime is 22551791. The next prime is 22551811. The reversal of 22551804 is 40815522.

It is a happy number.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48477 + ... + 48939.

It is an arithmetic number, because the mean of its divisors is an integer number (682080).

Almost surely, 2^22551804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22551804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32739840).

22551804 is an abundant number, since it is smaller than the sum of its proper divisors (42927876).

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

22551804 is a wasteful number, since it uses less digits than its factorization.

22551804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 22551804 is about 4748.8739717958. The cubic root of 22551804 is about 282.5273067295.

The spelling of 22551804 in words is "twenty-two million, five hundred fifty-one thousand, eight hundred four".