220444025 has 6 divisors (see below), whose sum is σ = 273350622. Its totient is φ = 176355200.

The previous prime is 220444009. The next prime is 220444027. The reversal of 220444025 is 520444022.

It can be written as a sum of positive squares in 3 ways, for example, as 13630864 + 206813161 = 3692^2 + 14381^2 .

It is not a de Polignac number, because 220444025 - 2⁴ = 220444009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220444027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4408856 + ... + 4408905.

It is an arithmetic number, because the mean of its divisors is an integer number (45558437).

Almost surely, 2^220444025 is an apocalyptic number.

220444025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220444025 is a deficient number, since it is larger than the sum of its proper divisors (52906597).

220444025 is an equidigital number, since it uses as much as digits as its factorization.

220444025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8817771 (or 8817766 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 220444025 is about 14847.3575089980. The cubic root of 220444025 is about 604.0869363409.

Adding to 220444025 its reverse (520444022), we get a palindrome (740888047).

The spelling of 220444025 in words is "two hundred twenty million, four hundred forty-four thousand, twenty-five".