225215444135 has 16 divisors (see below), whose sum is σ = 294895782432. Its totient is φ = 163755110400.

The previous prime is 225215444131. The next prime is 225215444173. The reversal of 225215444135 is 531444512522.

It is not a de Polignac number, because 225215444135 - 2² = 225215444131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225215444131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233546 + ... + 710615.

It is an arithmetic number, because the mean of its divisors is an integer number (18430986402).

Almost surely, 2^225215444135 is an apocalyptic number.

225215444135 is a deficient number, since it is larger than the sum of its proper divisors (69680338297).

225215444135 is a wasteful number, since it uses less digits than its factorization.

225215444135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948514.

The product of its digits is 192000, while the sum is 38.

Adding to 225215444135 its reverse (531444512522), we get a palindrome (756659956657).

The spelling of 225215444135 in words is "two hundred twenty-five billion, two hundred fifteen million, four hundred forty-four thousand, one hundred thirty-five".