224750921 has 2 divisors, whose sum is σ = 224750922. Its totient is φ = 224750920.

The previous prime is 224750893. The next prime is 224750923. The reversal of 224750921 is 129057422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220106896 + 4644025 = 14836^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 224750921 - 2¹⁰ = 224749897 is a prime.

Together with 224750923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (224750923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112375460 + 112375461.

It is an arithmetic number, because the mean of its divisors is an integer number (112375461).

Almost surely, 2^224750921 is an apocalyptic number.

It is an amenable number.

224750921 is a deficient number, since it is larger than the sum of its proper divisors (1).

224750921 is an equidigital number, since it uses as much as digits as its factorization.

224750921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 224750921 is about 14991.6950676033. The cubic root of 224750921 is about 607.9956798299.

The spelling of 224750921 in words is "two hundred twenty-four million, seven hundred fifty thousand, nine hundred twenty-one".