224213999 has 4 divisors (see below), whose sum is σ = 224607240. Its totient is φ = 223820760.

The previous prime is 224213989. The next prime is 224214007. The reversal of 224213999 is 999312422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224213999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224213909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195764 + ... + 196905.

It is an arithmetic number, because the mean of its divisors is an integer number (56151810).

Almost surely, 2^224213999 is an apocalyptic number.

224213999 is a deficient number, since it is larger than the sum of its proper divisors (393241).

224213999 is an equidigital number, since it uses as much as digits as its factorization.

224213999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393240.

The product of its digits is 69984, while the sum is 41.

The square root of 224213999 is about 14973.7770452214. Note that the first 3 decimals coincide. The cubic root of 224213999 is about 607.5111337130.

The spelling of 224213999 in words is "two hundred twenty-four million, two hundred thirteen thousand, nine hundred ninety-nine".