225815530 has 8 divisors (see below), whose sum is σ = 406467972. Its totient is φ = 90326208.

The previous prime is 225815483. The next prime is 225815561. The reversal of 225815530 is 35518522.

225815530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 203433169 + 22382361 = 14263^2 + 4731^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 225815492 and 225815501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11290767 + ... + 11290786.

Almost surely, 2^225815530 is an apocalyptic number.

225815530 is a deficient number, since it is larger than the sum of its proper divisors (180652442).

225815530 is a wasteful number, since it uses less digits than its factorization.

225815530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22581560.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 225815530 is about 15027.1597449418. The cubic root of 225815530 is about 608.9541606437.

The spelling of 225815530 in words is "two hundred twenty-five million, eight hundred fifteen thousand, five hundred thirty".