22255000 has 40 divisors (see below), whose sum is σ = 52155180. Its totient is φ = 8900000.

The previous prime is 22254997. The next prime is 22255003. The reversal of 22255000 is 55222.

It is an interprime number because it is at equal distance from previous prime (22254997) and next prime (22255003).

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255003) 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, 2775 + ... + 7225.

Almost surely, 2^22255000 is an apocalyptic number.

22255000 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 22255000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26077590).

22255000 is an abundant number, since it is smaller than the sum of its proper divisors (29900180).

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

22255000 is an equidigital number, since it uses as much as digits as its factorization.

22255000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477 (or 4458 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 22255000 is about 4717.5205351964. The cubic root of 22255000 is about 281.2823831025.

It can be divided in two parts, 2225 and 5000, that added together give a square (7225 = 85²).

The spelling of 22255000 in words is "twenty-two million, two hundred fifty-five thousand".