2243744561 has 16 divisors (see below), whose sum is σ = 2394584640. Its totient is φ = 2096274240.

The previous prime is 2243744549. The next prime is 2243744621. The reversal of 2243744561 is 1654473422.

It is a happy number.

2243744561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2243744561 - 2²⁶ = 2176635697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2243740561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1293851 + ... + 1295583.

It is an arithmetic number, because the mean of its divisors is an integer number (149661540).

Almost surely, 2^2243744561 is an apocalyptic number.

It is an amenable number.

2243744561 is a deficient number, since it is larger than the sum of its proper divisors (150840079).

2243744561 is a wasteful number, since it uses less digits than its factorization.

2243744561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656.

The product of its digits is 161280, while the sum is 38.

The square root of 2243744561 is about 47368.1808918181. The cubic root of 2243744561 is about 1309.1552079066.

The spelling of 2243744561 in words is "two billion, two hundred forty-three million, seven hundred forty-four thousand, five hundred sixty-one".