220000225 has 6 divisors (see below), whose sum is σ = 272800310. Its totient is φ = 176000160.

The previous prime is 220000201. The next prime is 220000237. The reversal of 220000225 is 522000022.

It can be written as a sum of positive squares in 3 ways, for example, as 2614689 + 217385536 = 1617^2 + 14744^2 .

It is not a de Polignac number, because 220000225 - 2¹⁹ = 219475937 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4399980 + ... + 4400029.

Almost surely, 2^220000225 is an apocalyptic number.

220000225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220000225 is a deficient number, since it is larger than the sum of its proper divisors (52800085).

220000225 is an equidigital number, since it uses as much as digits as its factorization.

220000225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8800019 (or 8800014 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 220000225 is about 14832.4045589378. The cubic root of 220000225 is about 603.6812794801.

Adding to 220000225 its reverse (522000022), we get a palindrome (742000247).

The spelling of 220000225 in words is "two hundred twenty million, two hundred twenty-five", and thus it is an aban number.