224649 has 12 divisors (see below), whose sum is σ = 328900. Its totient is φ = 147744.

The previous prime is 224633. The next prime is 224669. The reversal of 224649 is 946422.

It can be written as a sum of positive squares in 2 ways, for example, as 186624 + 38025 = 432^2 + 195^2 .

It is not a de Polignac number, because 224649 - 2⁴ = 224633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (224629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 867 + ... + 1095.

2²²⁴⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

224649 is a deficient number, since it is larger than the sum of its proper divisors (104251).

224649 is a wasteful number, since it uses less digits than its factorization.

224649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 341 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 224649 is about 473.9715181316. The cubic root of 224649 is about 60.7903760448.

Adding to 224649 its sum of digits (27), we get a square (224676 = 474²).

The spelling of 224649 in words is "two hundred twenty-four thousand, six hundred forty-nine".