311112213 has 16 divisors (see below), whose sum is σ = 437849280. Its totient is φ = 195951744.

The previous prime is 311112157. The next prime is 311112229. The reversal of 311112213 is 312211113.

It is a happy number.

It is not a de Polignac number, because 311112213 - 2⁹ = 311111701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311112192 and 311112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311112013) 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, 13945 + ... + 28577.

It is an arithmetic number, because the mean of its divisors is an integer number (27365580).

Almost surely, 2^311112213 is an apocalyptic number.

It is an amenable number.

311112213 is a deficient number, since it is larger than the sum of its proper divisors (126737067).

311112213 is a wasteful number, since it uses less digits than its factorization.

311112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15028.

The product of its digits is 36, while the sum is 15.

The square root of 311112213 is about 17638.3733093503. The cubic root of 311112213 is about 677.5983711774.

Adding to 311112213 its reverse (312211113), we get a palindrome (623323326).

The spelling of 311112213 in words is "three hundred eleven million, one hundred twelve thousand, two hundred thirteen".