224716561921 has 4 divisors (see below), whose sum is σ = 224785560132. Its totient is φ = 224647563712.

The previous prime is 224716561919. The next prime is 224716562017. The reversal of 224716561921 is 129165617422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196391671921 + 28324890000 = 443161^2 + 168300^2 .

It is a cyclic number.

It is not a de Polignac number, because 224716561921 - 2¹ = 224716561919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (224716564921) 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, 34494220 + ... + 34500733.

It is an arithmetic number, because the mean of its divisors is an integer number (56196390033).

Almost surely, 2^224716561921 is an apocalyptic number.

It is an amenable number.

224716561921 is a deficient number, since it is larger than the sum of its proper divisors (68998211).

224716561921 is an equidigital number, since it uses as much as digits as its factorization.

224716561921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68998210.

The product of its digits is 362880, while the sum is 46.

The spelling of 224716561921 in words is "two hundred twenty-four billion, seven hundred sixteen million, five hundred sixty-one thousand, nine hundred twenty-one".