2311311213 has 16 divisors (see below), whose sum is σ = 3424982400. Its totient is φ = 1540506240.

The previous prime is 2311311199. The next prime is 2311311241. The reversal of 2311311213 is 3121131132.

It is not a de Polignac number, because 2311311213 - 2⁸ = 2311310957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311311283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151453 + ... + 166013.

It is an arithmetic number, because the mean of its divisors is an integer number (214061400).

Almost surely, 2^2311311213 is an apocalyptic number.

It is an amenable number.

2311311213 is a deficient number, since it is larger than the sum of its proper divisors (1113671187).

2311311213 is a wasteful number, since it uses less digits than its factorization.

2311311213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20449 (or 20443 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 2311311213 is about 48076.0981465842. The cubic root of 2311311213 is about 1322.1664784323.

Adding to 2311311213 its reverse (3121131132), we get a palindrome (5432442345).

The spelling of 2311311213 in words is "two billion, three hundred eleven million, three hundred eleven thousand, two hundred thirteen".