224621 has 8 divisors (see below), whose sum is σ = 242424. Its totient is φ = 207360.

The previous prime is 224617. The next prime is 224629. The reversal of 224621 is 126422.

It can be written as a sum of positive squares in 4 ways, for example, as 12100 + 212521 = 110^2 + 461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 224621 - 2² = 224617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 a self number, because there is not a number n which added to its sum of digits gives 224621.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1151 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (30303).

2²²⁴⁶²¹ is an apocalyptic number.

It is an amenable number.

224621 is a deficient number, since it is larger than the sum of its proper divisors (17803).

224621 is a wasteful number, since it uses less digits than its factorization.

224621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its digits is 192, while the sum is 17.

The square root of 224621 is about 473.9419795713. The cubic root of 224621 is about 60.7878503251.

The spelling of 224621 in words is "two hundred twenty-four thousand, six hundred twenty-one".