2239731 has 24 divisors (see below), whose sum is σ = 3618160. Its totient is φ = 1376352.

The previous prime is 2239723. The next prime is 2239747. The reversal of 2239731 is 1379322.

2239731 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 2239731 - 2³ = 2239723 is a prime.

It is a super-2 number, since 2×2239731² = 10032789904722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 2239695 and 2239704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2239711) 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 23 ways as a sum of consecutive naturals, for example, 2805 + ... + 3513.

2^2239731 is an apocalyptic number.

2239731 is a deficient number, since it is larger than the sum of its proper divisors (1378429).

2239731 is an equidigital number, since it uses as much as digits as its factorization.

2239731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 725 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 2239731 is about 1496.5730854188. The cubic root of 2239731 is about 130.8374145976.

The spelling of 2239731 in words is "two million, two hundred thirty-nine thousand, seven hundred thirty-one".