311132332213 has 4 divisors (see below), whose sum is σ = 311285676940. Its totient is φ = 310978987488.

The previous prime is 311132332183. The next prime is 311132332243. The reversal of 311132332213 is 312233231113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312233231113 = 829 ⋅376638397.

It is an interprime number because it is at equal distance from previous prime (311132332183) and next prime (311132332243).

It can be written as a sum of positive squares in 2 ways, for example, as 249162702244 + 61969629969 = 499162^2 + 248937^2 .

It is a cyclic number.

It is not a de Polignac number, because 311132332213 - 2¹⁷ = 311132201141 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 (311132332243) 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, 76669320 + ... + 76673377.

It is an arithmetic number, because the mean of its divisors is an integer number (77821419235).

Almost surely, 2^311132332213 is an apocalyptic number.

It is an amenable number.

311132332213 is a deficient number, since it is larger than the sum of its proper divisors (153344727).

311132332213 is a wasteful number, since it uses less digits than its factorization.

311132332213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153344726.

The product of its digits is 1944, while the sum is 25.

Adding to 311132332213 its reverse (312233231113), we get a palindrome (623365563326).

The spelling of 311132332213 in words is "three hundred eleven billion, one hundred thirty-two million, three hundred thirty-two thousand, two hundred thirteen".