2311222213 has 4 divisors (see below), whose sum is σ = 2311416940. Its totient is φ = 2311027488.

The previous prime is 2311222211. The next prime is 2311222237. The reversal of 2311222213 is 3122221132.

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 741636289 + 1569585924 = 27233^2 + 39618^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311222213 - 2¹ = 2311222211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311222211) 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, 78318 + ... + 103711.

It is an arithmetic number, because the mean of its divisors is an integer number (577854235).

Almost surely, 2^2311222213 is an apocalyptic number.

It is an amenable number.

2311222213 is a deficient number, since it is larger than the sum of its proper divisors (194727).

2311222213 is a wasteful number, since it uses less digits than its factorization.

2311222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194726.

The product of its digits is 288, while the sum is 19.

The square root of 2311222213 is about 48075.1725217913. The cubic root of 2311222213 is about 1322.1495076430.

Adding to 2311222213 its reverse (3122221132), we get a palindrome (5433443345).

The spelling of 2311222213 in words is "two billion, three hundred eleven million, two hundred twenty-two thousand, two hundred thirteen".