225155 has 12 divisors (see below), whose sum is σ = 314640. Its totient is φ = 154224.

The previous prime is 225149. The next prime is 225157. The reversal of 225155 is 551522.

It is not a de Polignac number, because 225155 - 2¹⁰ = 224131 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225155.

It is not an unprimeable number, because it can be changed into a prime (225157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215 + ... + 704.

It is an arithmetic number, because the mean of its divisors is an integer number (26220).

2²²⁵¹⁵⁵ is an apocalyptic number.

225155 is a deficient number, since it is larger than the sum of its proper divisors (89485).

225155 is an equidigital number, since it uses as much as digits as its factorization.

225155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938 (or 931 counting only the distinct ones).

The product of its digits is 500, while the sum is 20.

The square root of 225155 is about 474.5050052423. The cubic root of 225155 is about 60.8359832877.

Adding to 225155 its reverse (551522), we get a palindrome (776677).

It can be divided in two parts, 22515 and 5, that multiplied together give a triangular number (112575 = T₄₇₄).

The spelling of 225155 in words is "two hundred twenty-five thousand, one hundred fifty-five".