222545000 has 80 divisors (see below), whose sum is σ = 533079360. Its totient is φ = 87032000.

The previous prime is 222544997. The next prime is 222545003. The reversal of 222545000 is 545222.

It is an interprime number because it is at equal distance from previous prime (222544997) and next prime (222545003).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222545003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 234527 + ... + 235473.

It is an arithmetic number, because the mean of its divisors is an integer number (6663492).

Almost surely, 2^222545000 is an apocalyptic number.

222545000 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 222545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266539680).

222545000 is an abundant number, since it is smaller than the sum of its proper divisors (310534360).

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

222545000 is an equidigital number, since it uses as much as digits as its factorization.

222545000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 222545000 is about 14917.9422173435. The cubic root of 222545000 is about 605.9999854771. Note that the first 4 decimals are identical.

The spelling of 222545000 in words is "two hundred twenty-two million, five hundred forty-five thousand".