2243147 has 4 divisors (see below), whose sum is σ = 2247960. Its totient is φ = 2238336.

The previous prime is 2243123. The next prime is 2243161. The reversal of 2243147 is 7413422.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2243147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2243107) 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, 1622 + ... + 2667.

It is an arithmetic number, because the mean of its divisors is an integer number (561990).

2^2243147 is an apocalyptic number.

2243147 is a deficient number, since it is larger than the sum of its proper divisors (4813).

2243147 is an equidigital number, since it uses as much as digits as its factorization.

2243147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812.

The product of its digits is 1344, while the sum is 23.

The square root of 2243147 is about 1497.7139246198. The cubic root of 2243147 is about 130.9038978165.

Adding to 2243147 its reverse (7413422), we get a palindrome (9656569).

The spelling of 2243147 in words is "two million, two hundred forty-three thousand, one hundred forty-seven".