2243857 has 24 divisors (see below), whose sum is σ = 2987712. Its totient is φ = 1663200.

The previous prime is 2243851. The next prime is 2243887. The reversal of 2243857 is 7583422.

It is not a de Polignac number, because 2243857 - 2¹¹ = 2241809 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 2 + 2²¹ + 4⁸ + 3⁷ + 8³ + 5⁷ + 7³ .

2243857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2243851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12307 + ... + 12487.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2^2243857 is an apocalyptic number.

It is an amenable number.

2243857 is a deficient number, since it is larger than the sum of its proper divisors (743855).

2243857 is a wasteful number, since it uses less digits than its factorization.

2243857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 222 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 2243857 is about 1497.9509337759. The cubic root of 2243857 is about 130.9177075762.

The spelling of 2243857 in words is "two million, two hundred forty-three thousand, eight hundred fifty-seven".