224021399 has 8 divisors (see below), whose sum is σ = 259109760. Its totient is φ = 189704376.

The previous prime is 224021389. The next prime is 224021437. The reversal of 224021399 is 993120422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 224021399 - 2⁴ = 224021383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224021389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192209 + ... + 193370.

It is an arithmetic number, because the mean of its divisors is an integer number (32388720).

Almost surely, 2^224021399 is an apocalyptic number.

224021399 is a deficient number, since it is larger than the sum of its proper divisors (35088361).

224021399 is an equidigital number, since it uses as much as digits as its factorization.

224021399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385669.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 224021399 is about 14967.3444204374. The cubic root of 224021399 is about 607.3371330353.

The spelling of 224021399 in words is "two hundred twenty-four million, twenty-one thousand, three hundred ninety-nine".