224999999 has 16 divisors (see below), whose sum is σ = 263043072. Its totient is φ = 188461728.

The previous prime is 224999989. The next prime is 225000011. The reversal of 224999999 is 999999422.

It is a Cunningham number, because it is equal to 15000²-1.

It is a de Polignac number, because none of the positive numbers 2^k-224999999 is a prime.

It is a Duffinian number.

224999999 is a modest number, since divided by 99999 gives 2249 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224999909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103922 + ... + 106064.

It is an arithmetic number, because the mean of its divisors is an integer number (16440192).

Almost surely, 2^224999999 is an apocalyptic number.

224999999 is a deficient number, since it is larger than the sum of its proper divisors (38043073).

224999999 is a wasteful number, since it uses less digits than its factorization.

224999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486.

The product of its digits is 8503056, while the sum is 62.

The square root of 224999999 is about 14999.9999666667. Note that the first 4 decimals coincide. The cubic root of 224999999 is about 608.2201986563.

The spelling of 224999999 in words is "two hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred ninety-nine".