224443981 has 4 divisors (see below), whose sum is σ = 224691264. Its totient is φ = 224196700.

The previous prime is 224443969. The next prime is 224443987. The reversal of 224443981 is 189344422.

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.

It is a cyclic number.

It is not a de Polignac number, because 224443981 - 2⁷ = 224443853 is a prime.

It is a super-2 number, since 2×224443981² = 100750201214256722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 224443981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224443987) 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, 122275 + ... + 124096.

It is an arithmetic number, because the mean of its divisors is an integer number (56172816).

Almost surely, 2^224443981 is an apocalyptic number.

It is an amenable number.

224443981 is a deficient number, since it is larger than the sum of its proper divisors (247283).

224443981 is an equidigital number, since it uses as much as digits as its factorization.

224443981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247282.

The product of its digits is 55296, while the sum is 37.

The square root of 224443981 is about 14981.4545688995. The cubic root of 224443981 is about 607.7187759403.

It can be divided in two parts, 2244 and 43981, that added together give a square (46225 = 215²).

The spelling of 224443981 in words is "two hundred twenty-four million, four hundred forty-three thousand, nine hundred eighty-one".