2313221 has 4 divisors (see below), whose sum is σ = 2317932. Its totient is φ = 2308512.

The previous prime is 2313211. The next prime is 2313239. The reversal of 2313221 is 1223132.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96100 + 2217121 = 310^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2313221 - 2¹⁴ = 2296837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2313196 and 2313205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2313211) 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, 1520 + ... + 2633.

It is an arithmetic number, because the mean of its divisors is an integer number (579483).

2^2313221 is an apocalyptic number.

It is an amenable number.

2313221 is a deficient number, since it is larger than the sum of its proper divisors (4711).

2313221 is an equidigital number, since it uses as much as digits as its factorization.

2313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4710.

The product of its digits is 72, while the sum is 14.

The square root of 2313221 is about 1520.9276774390. The cubic root of 2313221 is about 132.2530537470.

Adding to 2313221 its reverse (1223132), we get a palindrome (3536353).

The spelling of 2313221 in words is "two million, three hundred thirteen thousand, two hundred twenty-one".