222288725 has 6 divisors (see below), whose sum is σ = 275638050. Its totient is φ = 177830960.

The previous prime is 222288713. The next prime is 222288743. The reversal of 222288725 is 527882222.

It can be written as a sum of positive squares in 3 ways, for example, as 4401604 + 217887121 = 2098^2 + 14761^2 .

It is not a de Polignac number, because 222288725 - 2¹⁶ = 222223189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4445750 + ... + 4445799.

It is an arithmetic number, because the mean of its divisors is an integer number (45939675).

Almost surely, 2^222288725 is an apocalyptic number.

222288725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

222288725 is a deficient number, since it is larger than the sum of its proper divisors (53349325).

222288725 is an equidigital number, since it uses as much as digits as its factorization.

222288725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8891559 (or 8891554 counting only the distinct ones).

The product of its digits is 71680, while the sum is 38.

The square root of 222288725 is about 14909.3502541191. The cubic root of 222288725 is about 605.7672800345.

The spelling of 222288725 in words is "two hundred twenty-two million, two hundred eighty-eight thousand, seven hundred twenty-five".