2243731 has 4 divisors (see below), whose sum is σ = 2564272. Its totient is φ = 1923192.

The previous prime is 2243723. The next prime is 2243741. The reversal of 2243731 is 1373422.

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

It is a cyclic number.

It is not a de Polignac number, because 2243731 - 2³ = 2243723 is a prime.

It is a super-2 number, since 2×2243731² = 10068657600722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2243741) 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, 160260 + ... + 160273.

It is an arithmetic number, because the mean of its divisors is an integer number (641068).

2^2243731 is an apocalyptic number.

2243731 is a deficient number, since it is larger than the sum of its proper divisors (320541).

2243731 is an equidigital number, since it uses as much as digits as its factorization.

2243731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320540.

The product of its digits is 1008, while the sum is 22.

The square root of 2243731 is about 1497.9088757331. The cubic root of 2243731 is about 130.9152570427.

The spelling of 2243731 in words is "two million, two hundred forty-three thousand, seven hundred thirty-one".