224601721 has 2 divisors, whose sum is σ = 224601722. Its totient is φ = 224601720.

The previous prime is 224601691. The next prime is 224601733. The reversal of 224601721 is 127106422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208513600 + 16088121 = 14440^2 + 4011^2 .

It is a cyclic number.

It is not a de Polignac number, because 224601721 - 2⁷ = 224601593 is a prime.

It is not a weakly prime, because it can be changed into another prime (224601761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112300860 + 112300861.

It is an arithmetic number, because the mean of its divisors is an integer number (112300861).

Almost surely, 2^224601721 is an apocalyptic number.

It is an amenable number.

224601721 is a deficient number, since it is larger than the sum of its proper divisors (1).

224601721 is an equidigital number, since it uses as much as digits as its factorization.

224601721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 224601721 is about 14986.7181530848. The cubic root of 224601721 is about 607.8611115479.

The spelling of 224601721 in words is "two hundred twenty-four million, six hundred one thousand, seven hundred twenty-one".