224447021 has 4 divisors (see below), whose sum is σ = 224654592. Its totient is φ = 224239452.

The previous prime is 224447009. The next prime is 224447029. The reversal of 224447021 is 120744422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120744422 = 2 ⋅60372211.

It is a cyclic number.

It is not a de Polignac number, because 224447021 - 2¹⁰ = 224445997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224447029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102155 + ... + 104328.

It is an arithmetic number, because the mean of its divisors is an integer number (56163648).

Almost surely, 2^224447021 is an apocalyptic number.

It is an amenable number.

224447021 is a deficient number, since it is larger than the sum of its proper divisors (207571).

224447021 is a wasteful number, since it uses less digits than its factorization.

224447021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207570.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 224447021 is about 14981.5560273291. The cubic root of 224447021 is about 607.7215196936.

The spelling of 224447021 in words is "two hundred twenty-four million, four hundred forty-seven thousand, twenty-one".