2731223 has 4 divisors (see below), whose sum is σ = 2979528. Its totient is φ = 2482920.

The previous prime is 2731207. The next prime is 2731241. The reversal of 2731223 is 3221372.

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

It is not a de Polignac number, because 2731223 - 2⁴ = 2731207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2731195 and 2731204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731243) 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 3 ways as a sum of consecutive naturals, for example, 124136 + ... + 124157.

It is an arithmetic number, because the mean of its divisors is an integer number (744882).

2^2731223 is an apocalyptic number.

2731223 is a deficient number, since it is larger than the sum of its proper divisors (248305).

2731223 is a wasteful number, since it uses less digits than its factorization.

2731223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248304.

The product of its digits is 504, while the sum is 20.

The square root of 2731223 is about 1652.6412193819. The cubic root of 2731223 is about 139.7823659385.

Adding to 2731223 its reverse (3221372), we get a palindrome (5952595).

The spelling of 2731223 in words is "two million, seven hundred thirty-one thousand, two hundred twenty-three".