2243691 has 12 divisors (see below), whose sum is σ = 3411720. Its totient is φ = 1416960.

The previous prime is 2243669. The next prime is 2243693. The reversal of 2243691 is 1963422.

2243691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2243691 - 2¹⁴ = 2227307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2243693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6390 + ... + 6731.

It is an arithmetic number, because the mean of its divisors is an integer number (284310).

2^2243691 is an apocalyptic number.

2243691 is a deficient number, since it is larger than the sum of its proper divisors (1168029).

2243691 is a wasteful number, since it uses less digits than its factorization.

2243691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13146 (or 13143 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 2243691 is about 1497.8955237265. The cubic root of 2243691 is about 130.9144790764.

The spelling of 2243691 in words is "two million, two hundred forty-three thousand, six hundred ninety-one".