2243647 has 4 divisors (see below), whose sum is σ = 2564176. Its totient is φ = 1923120.

The previous prime is 2243623. The next prime is 2243663. The reversal of 2243647 is 7463422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7463422 = 2 ⋅3731711.

It is a cyclic number.

It is not a de Polignac number, because 2243647 - 2¹¹ = 2241599 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 (2243617) 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, 160254 + ... + 160267.

It is an arithmetic number, because the mean of its divisors is an integer number (641044).

2^2243647 is an apocalyptic number.

2243647 is a deficient number, since it is larger than the sum of its proper divisors (320529).

2243647 is an equidigital number, since it uses as much as digits as its factorization.

2243647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320528.

The product of its digits is 8064, while the sum is 28.

The square root of 2243647 is about 1497.8808363819. The cubic root of 2243647 is about 130.9136233028.

The spelling of 2243647 in words is "two million, two hundred forty-three thousand, six hundred forty-seven".