224591985 has 12 divisors (see below), whose sum is σ = 389292852. Its totient is φ = 119782368.

The previous prime is 224591971. The next prime is 224592013. The reversal of 224591985 is 589195422.

It is a happy number.

224591985 is a `hidden beast` number, since 2 + 2 + 459 + 198 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 145950561 + 78641424 = 12081^2 + 8868^2 .

It is not a de Polignac number, because 224591985 - 2⁵ = 224591953 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4990933 = 224591985 / (2 + 2 + 4 + 5 + 9 + 1 + 9 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 224591985.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 2495422 + ... + 2495511.

It is an arithmetic number, because the mean of its divisors is an integer number (32441071).

Almost surely, 2^224591985 is an apocalyptic number.

It is an amenable number.

224591985 is a deficient number, since it is larger than the sum of its proper divisors (164700867).

224591985 is a wasteful number, since it uses less digits than its factorization.

224591985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990944 (or 4990941 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 224591985 is about 14986.3933286165. The cubic root of 224591985 is about 607.8523282651.

The spelling of 224591985 in words is "two hundred twenty-four million, five hundred ninety-one thousand, nine hundred eighty-five".