224239391 has 2 divisors, whose sum is σ = 224239392. Its totient is φ = 224239390.

The previous prime is 224239361. The next prime is 224239403. The reversal of 224239391 is 193932422.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224239391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224239361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112119695 + 112119696.

It is an arithmetic number, because the mean of its divisors is an integer number (112119696).

Almost surely, 2^224239391 is an apocalyptic number.

224239391 is a deficient number, since it is larger than the sum of its proper divisors (1).

224239391 is an equidigital number, since it uses as much as digits as its factorization.

224239391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 224239391 is about 14974.6249034826. The cubic root of 224239391 is about 607.5340661800.

The spelling of 224239391 in words is "two hundred twenty-four million, two hundred thirty-nine thousand, three hundred ninety-one".