224077921 has 2 divisors, whose sum is σ = 224077922. Its totient is φ = 224077920.

The previous prime is 224077913. The next prime is 224077927. The reversal of 224077921 is 129770422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190854225 + 33223696 = 13815^2 + 5764^2 .

It is a cyclic number.

It is not a de Polignac number, because 224077921 - 2³ = 224077913 is a prime.

It is not a weakly prime, because it can be changed into another prime (224077927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112038960 + 112038961.

It is an arithmetic number, because the mean of its divisors is an integer number (112038961).

Almost surely, 2^224077921 is an apocalyptic number.

It is an amenable number.

224077921 is a deficient number, since it is larger than the sum of its proper divisors (1).

224077921 is an equidigital number, since it uses as much as digits as its factorization.

224077921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 224077921 is about 14969.2324786543. The cubic root of 224077921 is about 607.3882070591.

The spelling of 224077921 in words is "two hundred twenty-four million, seventy-seven thousand, nine hundred twenty-one".