225290 has 16 divisors (see below), whose sum is σ = 436968. Its totient is φ = 83136.

The previous prime is 225289. The next prime is 225299. The reversal of 225290 is 92522.

It can be written as a sum of positive squares in 4 ways, for example, as 134689 + 90601 = 367^2 + 301^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737 + ... + 996.

2²²⁵²⁹⁰ is an apocalyptic number.

225290 is a deficient number, since it is larger than the sum of its proper divisors (211678).

225290 is a wasteful number, since it uses less digits than its factorization.

225290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 225290 is about 474.6472374301. The cubic root of 225290 is about 60.8481396790.

It can be divided in two parts, 225 and 290, that added together give a palindrome (515).

The spelling of 225290 in words is "two hundred twenty-five thousand, two hundred ninety".