225512730 has 48 divisors (see below), whose sum is σ = 595959624. Its totient is φ = 59149440.

The previous prime is 225512717. The next prime is 225512731. The reversal of 225512730 is 37215522.

It can be written as a sum of positive squares in 4 ways, for example, as 173369889 + 52142841 = 13167^2 + 7221^2 .

It is a junction number, because it is equal to n+sod(n) for n = 225512694 and 225512703.

It is not an unprimeable number, because it can be changed into a prime (225512731) by changing a digit.

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, 15049 + ... + 26028.

Almost surely, 2^225512730 is an apocalyptic number.

225512730 is an abundant number, since it is smaller than the sum of its proper divisors (370446894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225512730 is a wasteful number, since it uses less digits than its factorization.

225512730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41151 (or 41148 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 225512730 is about 15017.0812743356. The cubic root of 225512730 is about 608.6818531263.

It can be divided in two parts, 22551 and 2730, that added together give a square (25281 = 159²).

The spelling of 225512730 in words is "two hundred twenty-five million, five hundred twelve thousand, seven hundred thirty".