224215549 has 2 divisors, whose sum is σ = 224215550. Its totient is φ = 224215548.

The previous prime is 224215547. The next prime is 224215679. The reversal of 224215549 is 945512422.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 72556324 = 12315^2 + 8518^2 .

It is a cyclic number.

It is not a de Polignac number, because 224215549 - 2¹ = 224215547 is a prime.

It is a super-2 number, since 2×224215549² = 100545224826742802, which contains 22 as substring.

Together with 224215547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224215543) 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, 112107774 + 112107775.

It is an arithmetic number, because the mean of its divisors is an integer number (112107775).

Almost surely, 2^224215549 is an apocalyptic number.

It is an amenable number.

224215549 is a deficient number, since it is larger than the sum of its proper divisors (1).

224215549 is an equidigital number, since it uses as much as digits as its factorization.

224215549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The square root of 224215549 is about 14973.8288022803. The cubic root of 224215549 is about 607.5125336257.

The spelling of 224215549 in words is "two hundred twenty-four million, two hundred fifteen thousand, five hundred forty-nine".