22655500 has 48 divisors (see below), whose sum is σ = 56556864. Its totient is φ = 7766400.

The previous prime is 22655491. The next prime is 22655519. The reversal of 22655500 is 555622.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 264 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (1178268).

Almost surely, 2^22655500 is an apocalyptic number.

22655500 is a gapful number since it is divisible by the number (20) 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 22655500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28278432).

22655500 is an abundant number, since it is smaller than the sum of its proper divisors (33901364).

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

22655500 is a wasteful number, since it uses less digits than its factorization.

22655500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6499 (or 6487 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 22655500 is about 4759.7794066532. The cubic root of 22655500 is about 282.9596766082.

The spelling of 22655500 in words is "twenty-two million, six hundred fifty-five thousand, five hundred".