224251409 has 4 divisors (see below), whose sum is σ = 224548404. Its totient is φ = 223954416.

The previous prime is 224251387. The next prime is 224251451. The reversal of 224251409 is 904152422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904152422 = 2 ⋅452076211.

It can be written as a sum of positive squares in 2 ways, for example, as 138133009 + 86118400 = 11753^2 + 9280^2 .

It is a cyclic number.

It is not a de Polignac number, because 224251409 - 2¹⁶ = 224185873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (224251499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147362 + ... + 148875.

It is an arithmetic number, because the mean of its divisors is an integer number (56137101).

Almost surely, 2^224251409 is an apocalyptic number.

It is an amenable number.

224251409 is a deficient number, since it is larger than the sum of its proper divisors (296995).

224251409 is an equidigital number, since it uses as much as digits as its factorization.

224251409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296994.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 224251409 is about 14975.0261769387. The cubic root of 224251409 is about 607.5449194827.

The spelling of 224251409 in words is "two hundred twenty-four million, two hundred fifty-one thousand, four hundred nine".