225890165 has 8 divisors (see below), whose sum is σ = 275114400. Its totient is φ = 178014672.

The previous prime is 225890141. The next prime is 225890167. The reversal of 225890165 is 561098522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225890165 - 2¹² = 225886069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225890167) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 336815 + ... + 337484.

It is an arithmetic number, because the mean of its divisors is an integer number (34389300).

Almost surely, 2^225890165 is an apocalyptic number.

It is an amenable number.

225890165 is a deficient number, since it is larger than the sum of its proper divisors (49224235).

225890165 is an equidigital number, since it uses as much as digits as its factorization.

225890165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674371.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 225890165 is about 15029.6428766621. The cubic root of 225890165 is about 609.0212423712.

The spelling of 225890165 in words is "two hundred twenty-five million, eight hundred ninety thousand, one hundred sixty-five".