2243997 has 32 divisors (see below), whose sum is σ = 3932160. Its totient is φ = 1237680.

The previous prime is 2243987. The next prime is 2244091. The reversal of 2243997 is 7993422.

It is not a de Polignac number, because 2243997 - 2⁸ = 2243741 is a prime.

2243997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5668 + ... + 6050.

It is an arithmetic number, because the mean of its divisors is an integer number (122880).

2^2243997 is an apocalyptic number.

2243997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2243997 is a deficient number, since it is larger than the sum of its proper divisors (1688163).

2243997 is a wasteful number, since it uses less digits than its factorization.

2243997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 424 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 2243997 is about 1497.9976635496. The cubic root of 2243997 is about 130.9204302835.

It can be divided in two parts, 2243 and 997, that added together give a triangular number (3240 = T₈₀).

The spelling of 2243997 in words is "two million, two hundred forty-three thousand, nine hundred ninety-seven".