222516625 has 8 divisors (see below), whose sum is σ = 277700904. Its totient is φ = 178013200.

The previous prime is 222516611. The next prime is 222516649. The reversal of 222516625 is 526615222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5013121 + 217503504 = 2239^2 + 14748^2 .

It is not a de Polignac number, because 222516625 - 2¹⁵ = 222483857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889942 + ... + 890191.

It is an arithmetic number, because the mean of its divisors is an integer number (34712613).

Almost surely, 2^222516625 is an apocalyptic number.

222516625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

222516625 is a deficient number, since it is larger than the sum of its proper divisors (55184279).

222516625 is an equidigital number, since it uses as much as digits as its factorization.

222516625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780148 (or 1780138 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 222516625 is about 14916.9911510331. The cubic root of 222516625 is about 605.9742289178.

The spelling of 222516625 in words is "two hundred twenty-two million, five hundred sixteen thousand, six hundred twenty-five".