224195021 has 2 divisors, whose sum is σ = 224195022. Its totient is φ = 224195020.

The previous prime is 224194967. The next prime is 224195071. The reversal of 224195021 is 120591422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138909796 + 85285225 = 11786^2 + 9235^2 .

It is a cyclic number.

It is not a de Polignac number, because 224195021 - 2¹⁴ = 224178637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224195071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112097510 + 112097511.

It is an arithmetic number, because the mean of its divisors is an integer number (112097511).

Almost surely, 2^224195021 is an apocalyptic number.

It is an amenable number.

224195021 is a deficient number, since it is larger than the sum of its proper divisors (1).

224195021 is an equidigital number, since it uses as much as digits as its factorization.

224195021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 224195021 is about 14973.1433239651. The cubic root of 224195021 is about 607.4939928392.

The spelling of 224195021 in words is "two hundred twenty-four million, one hundred ninety-five thousand, twenty-one".