225215145 has 24 divisors (see below), whose sum is σ = 391525056. Its totient is φ = 119760288.

The previous prime is 225215119. The next prime is 225215161. The reversal of 225215145 is 541512522.

It is not a de Polignac number, because 225215145 - 2¹⁶ = 225149609 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8404 + ... + 22826.

It is an arithmetic number, because the mean of its divisors is an integer number (16313544).

Almost surely, 2^225215145 is an apocalyptic number.

It is an amenable number.

225215145 is a deficient number, since it is larger than the sum of its proper divisors (166309911).

225215145 is a wasteful number, since it uses less digits than its factorization.

225215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14781 (or 14778 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 225215145 is about 15007.1697864721. The cubic root of 225215145 is about 608.4139978521.

Adding to 225215145 its reverse (541512522), we get a palindrome (766727667).

The spelling of 225215145 in words is "two hundred twenty-five million, two hundred fifteen thousand, one hundred forty-five".