2231739 has 8 divisors (see below), whose sum is σ = 3306320. Its totient is φ = 1487808.

The previous prime is 2231737. The next prime is 2231767. The reversal of 2231739 is 9371322.

2231739 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 2231739 - 2¹ = 2231737 is a prime.

It is a super-3 number, since 3×2231739³ = 33346592567785309257, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 82657 = 2231739 / (2 + 2 + 3 + 1 + 7 + 3 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231731) 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 7 ways as a sum of consecutive naturals, for example, 41302 + ... + 41355.

It is an arithmetic number, because the mean of its divisors is an integer number (413290).

2^2231739 is an apocalyptic number.

2231739 is a deficient number, since it is larger than the sum of its proper divisors (1074581).

2231739 is an equidigital number, since it uses as much as digits as its factorization.

2231739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82666 (or 82660 counting only the distinct ones).

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

The square root of 2231739 is about 1493.9005991029. The cubic root of 2231739 is about 130.6816073723.

The spelling of 2231739 in words is "two million, two hundred thirty-one thousand, seven hundred thirty-nine".