225622166 has 72 divisors (see below), whose sum is σ = 442123920. Its totient is φ = 86005920.

The previous prime is 225622129. The next prime is 225622171. The reversal of 225622166 is 661226522.

225622166 = 359² + 360² + ... + 897².

Its product of digits (17280) is a multiple of the sum of its prime divisors (432).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 628295 + ... + 628653.

It is an arithmetic number, because the mean of its divisors is an integer number (6140610).

Almost surely, 2^225622166 is an apocalyptic number.

225622166 is a deficient number, since it is larger than the sum of its proper divisors (216501754).

225622166 is a wasteful number, since it uses less digits than its factorization.

225622166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 432 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 225622166 is about 15020.7245497679. The cubic root of 225622166 is about 608.7802968448.

Adding to 225622166 its reverse (661226522), we get a palindrome (886848688).

The spelling of 225622166 in words is "two hundred twenty-five million, six hundred twenty-two thousand, one hundred sixty-six".