224399 has 4 divisors (see below), whose sum is σ = 256464. Its totient is φ = 192336.

The previous prime is 224363. The next prime is 224401. The reversal of 224399 is 993422.

224399 = T₁₇₂ + T₁₇₃ + ... + T₁₈₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993422 = 2 ⋅496711.

It is a cyclic number.

It is not a de Polignac number, because 224399 - 2¹⁶ = 158863 is a prime.

It is a super-2 number, since 2×224399² = 100709822402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224309) 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 in 3 ways as a sum of consecutive naturals, for example, 16022 + ... + 16035.

It is an arithmetic number, because the mean of its divisors is an integer number (64116).

2²²⁴³⁹⁹ is an apocalyptic number.

224399 is a deficient number, since it is larger than the sum of its proper divisors (32065).

224399 is an equidigital number, since it uses as much as digits as its factorization.

224399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32064.

The product of its digits is 3888, while the sum is 29.

The square root of 224399 is about 473.7077157911. The cubic root of 224399 is about 60.7678175424.

The spelling of 224399 in words is "two hundred twenty-four thousand, three hundred ninety-nine".