225218824 has 8 divisors (see below), whose sum is σ = 422285310. Its totient is φ = 112609408.

The previous prime is 225218803. The next prime is 225218827. The reversal of 225218824 is 428812522.

It can be written as a sum of positive squares in only one way, i.e., 167184900 + 58033924 = 12930^2 + 7618^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 225218824.

It is not an unprimeable number, because it can be changed into a prime (225218827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14076169 + ... + 14076184.

Almost surely, 2^225218824 is an apocalyptic number.

It is an amenable number.

225218824 is a deficient number, since it is larger than the sum of its proper divisors (197066486).

225218824 is a wasteful number, since it uses less digits than its factorization.

225218824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28152359 (or 28152355 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 225218824 is about 15007.2923607158. The cubic root of 225218824 is about 608.4173107479.

The spelling of 225218824 in words is "two hundred twenty-five million, two hundred eighteen thousand, eight hundred twenty-four".