224320397 has 4 divisors (see below), whose sum is σ = 256366176. Its totient is φ = 192274620.

The previous prime is 224320391. The next prime is 224320399. The reversal of 224320397 is 793023422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 224320397 - 2¹⁶ = 224254861 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 (224320391) 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, 16022879 + ... + 16022892.

It is an arithmetic number, because the mean of its divisors is an integer number (64091544).

Almost surely, 2^224320397 is an apocalyptic number.

It is an amenable number.

224320397 is a deficient number, since it is larger than the sum of its proper divisors (32045779).

224320397 is an equidigital number, since it uses as much as digits as its factorization.

224320397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32045778.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 224320397 is about 14977.3294348492. The cubic root of 224320397 is about 607.6072141662.

The spelling of 224320397 in words is "two hundred twenty-four million, three hundred twenty thousand, three hundred ninety-seven".