2311213 has 4 divisors (see below), whose sum is σ = 2390940. Its totient is φ = 2231488.

The previous prime is 2311193. The next prime is 2311223. The reversal of 2311213 is 3121132.

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 1085764 + 1225449 = 1042^2 + 1107^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311213 - 2⁵ = 2311181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311193 and 2311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311223) 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, 39820 + ... + 39877.

It is an arithmetic number, because the mean of its divisors is an integer number (597735).

2^2311213 is an apocalyptic number.

It is an amenable number.

2311213 is a deficient number, since it is larger than the sum of its proper divisors (79727).

2311213 is an equidigital number, since it uses as much as digits as its factorization.

2311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79726.

The product of its digits is 36, while the sum is 13.

The square root of 2311213 is about 1520.2674106880. The cubic root of 2311213 is about 132.2147750855.

Adding to 2311213 its reverse (3121132), we get a palindrome (5432345).

It can be divided in two parts, 231 and 1213, that added together give a square (1444 = 38²).

The spelling of 2311213 in words is "two million, three hundred eleven thousand, two hundred thirteen".