225542155 has 8 divisors (see below), whose sum is σ = 271534032. Its totient is φ = 179844768.

The previous prime is 225542153. The next prime is 225542183. The reversal of 225542155 is 551245522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225542155 - 2¹ = 225542153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225542153) 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 7 ways as a sum of consecutive naturals, for example, 71932 + ... + 75001.

It is an arithmetic number, because the mean of its divisors is an integer number (33941754).

Almost surely, 2^225542155 is an apocalyptic number.

225542155 is a deficient number, since it is larger than the sum of its proper divisors (45991877).

225542155 is a wasteful number, since it uses less digits than its factorization.

225542155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147245.

The product of its digits is 20000, while the sum is 31.

The square root of 225542155 is about 15018.0609600574. The cubic root of 225542155 is about 608.7083256667.

Adding to 225542155 its reverse (551245522), we get a palindrome (776787677).

The spelling of 225542155 in words is "two hundred twenty-five million, five hundred forty-two thousand, one hundred fifty-five".