224640817 has 2 divisors, whose sum is σ = 224640818. Its totient is φ = 224640816.

The previous prime is 224640809. The next prime is 224640827. The reversal of 224640817 is 718046422.

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., 183629601 + 41011216 = 13551^2 + 6404^2 .

It is a cyclic number.

It is not a de Polignac number, because 224640817 - 2³ = 224640809 is a prime.

It is not a weakly prime, because it can be changed into another prime (224640827) 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, 112320408 + 112320409.

It is an arithmetic number, because the mean of its divisors is an integer number (112320409).

Almost surely, 2^224640817 is an apocalyptic number.

It is an amenable number.

224640817 is a deficient number, since it is larger than the sum of its proper divisors (1).

224640817 is an equidigital number, since it uses as much as digits as its factorization.

224640817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 224640817 is about 14988.0224512776. The cubic root of 224640817 is about 607.8963792492.

The spelling of 224640817 in words is "two hundred twenty-four million, six hundred forty thousand, eight hundred seventeen".