225000155 has 4 divisors (see below), whose sum is σ = 270000192. Its totient is φ = 180000120.

The previous prime is 225000131. The next prime is 225000157. The reversal of 225000155 is 551000522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225000155 - 2⁶ = 225000091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225000157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22500011 + ... + 22500020.

It is an arithmetic number, because the mean of its divisors is an integer number (67500048).

Almost surely, 2^225000155 is an apocalyptic number.

225000155 is a deficient number, since it is larger than the sum of its proper divisors (45000037).

225000155 is an equidigital number, since it uses as much as digits as its factorization.

225000155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45000036.

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

The square root of 225000155 is about 15000.0051666658. The cubic root of 225000155 is about 608.2203392227.

Adding to 225000155 its reverse (551000522), we get a palindrome (776000677).

The spelling of 225000155 in words is "two hundred twenty-five million, one hundred fifty-five", and thus it is an aban number.