224323921 has 2 divisors, whose sum is σ = 224323922. Its totient is φ = 224323920.

The previous prime is 224323909. The next prime is 224323943. The reversal of 224323921 is 129323422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127577025 + 96746896 = 11295^2 + 9836^2 .

It is a cyclic number.

It is not a de Polignac number, because 224323921 - 2¹⁷ = 224192849 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224323921.

It is not a weakly prime, because it can be changed into another prime (224327921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112161960 + 112161961.

It is an arithmetic number, because the mean of its divisors is an integer number (112161961).

Almost surely, 2^224323921 is an apocalyptic number.

It is an amenable number.

224323921 is a deficient number, since it is larger than the sum of its proper divisors (1).

224323921 is an equidigital number, since it uses as much as digits as its factorization.

224323921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 224323921 is about 14977.4470788583. The cubic root of 224323921 is about 607.6103959197.

The spelling of 224323921 in words is "two hundred twenty-four million, three hundred twenty-three thousand, nine hundred twenty-one".