2731323 has 16 divisors (see below), whose sum is σ = 4202496. Its totient is φ = 1545600.

The previous prime is 2731291. The next prime is 2731327. The reversal of 2731323 is 3231372.

It is not a de Polignac number, because 2731323 - 2⁵ = 2731291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2731323.

It is not an unprimeable number, because it can be changed into a prime (2731327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1798 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (262656).

2^2731323 is an apocalyptic number.

2731323 is a deficient number, since it is larger than the sum of its proper divisors (1471173).

2731323 is a wasteful number, since it uses less digits than its factorization.

2731323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274.

The product of its digits is 756, while the sum is 21.

The square root of 2731323 is about 1652.6714737055. The cubic root of 2731323 is about 139.7840718978.

Adding to 2731323 its reverse (3231372), we get a palindrome (5962695).

It can be divided in two parts, 273 and 1323, that added together give a triangular number (1596 = T₅₆).

The spelling of 2731323 in words is "two million, seven hundred thirty-one thousand, three hundred twenty-three".