225196815 has 16 divisors (see below), whose sum is σ = 360745056. Its totient is φ = 119961600.

The previous prime is 225196747. The next prime is 225196817. The reversal of 225196815 is 518691522.

It is not a de Polignac number, because 225196815 - 2¹⁰ = 225195791 is a prime.

It is a super-2 number, since 2×225196815² = 101427210972288450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225196817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4695 + ... + 21735.

It is an arithmetic number, because the mean of its divisors is an integer number (22546566).

Almost surely, 2^225196815 is an apocalyptic number.

225196815 is a deficient number, since it is larger than the sum of its proper divisors (135548241).

225196815 is a wasteful number, since it uses less digits than its factorization.

225196815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17930.

The product of its digits is 43200, while the sum is 39.

The square root of 225196815 is about 15006.5590659551. The cubic root of 225196815 is about 608.3974913672.

The spelling of 225196815 in words is "two hundred twenty-five million, one hundred ninety-six thousand, eight hundred fifteen".