225222155 has 16 divisors (see below), whose sum is σ = 274931904. Its totient is φ = 177085440.

The previous prime is 225222139. The next prime is 225222163. The reversal of 225222155 is 551222522.

It is not a de Polignac number, because 225222155 - 2⁴ = 225222139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122090 + ... + 123920.

It is an arithmetic number, because the mean of its divisors is an integer number (17183244).

Almost surely, 2^225222155 is an apocalyptic number.

225222155 is a deficient number, since it is larger than the sum of its proper divisors (49709749).

225222155 is a wasteful number, since it uses less digits than its factorization.

225222155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246.

The product of its digits is 4000, while the sum is 26.

The square root of 225222155 is about 15007.4033396854. The cubic root of 225222155 is about 608.4203102427.

Adding to 225222155 its reverse (551222522), we get a palindrome (776444677).

The spelling of 225222155 in words is "two hundred twenty-five million, two hundred twenty-two thousand, one hundred fifty-five".