222545280 has 128 divisors (see below), whose sum is σ = 732441600. Its totient is φ = 57415680.

The previous prime is 222545261. The next prime is 222545299. The reversal of 222545280 is 82545222.

It is an interprime number because it is at equal distance from previous prime (222545261) and next prime (222545299).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 57651 + ... + 61389.

It is an arithmetic number, because the mean of its divisors is an integer number (5722200).

Almost surely, 2^222545280 is an apocalyptic number.

222545280 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 222545280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366220800).

222545280 is an abundant number, since it is smaller than the sum of its proper divisors (509896320).

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

222545280 is a wasteful number, since it uses less digits than its factorization.

222545280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792 (or 3780 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 222545280 is about 14917.9516020129. The cubic root of 222545280 is about 606.0002396278. Note that the first 3 decimals are identical.

The spelling of 222545280 in words is "two hundred twenty-two million, five hundred forty-five thousand, two hundred eighty".