2243871 has 12 divisors (see below), whose sum is σ = 3704272. Its totient is φ = 1282176.

The previous prime is 2243851. The next prime is 2243887. The reversal of 2243871 is 1783422.

It is not a de Polignac number, because 2243871 - 2⁷ = 2243743 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 (2243821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17746 + ... + 17871.

2^2243871 is an apocalyptic number.

2243871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2243871 is a deficient number, since it is larger than the sum of its proper divisors (1460401).

2243871 is a wasteful number, since it uses less digits than its factorization.

2243871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35630 (or 35627 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2243871 is about 1497.9556068188. The cubic root of 2243871 is about 130.9179798520.

It can be divided in two parts, 224 and 3871, that added together give a triangular number (4095 = T₉₀).

The spelling of 2243871 in words is "two million, two hundred forty-three thousand, eight hundred seventy-one".