311444013 has 4 divisors (see below), whose sum is σ = 415258688. Its totient is φ = 207629340.

The previous prime is 311444009. The next prime is 311444017. The reversal of 311444013 is 310444113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (311444009) and next prime (311444017).

It is not a de Polignac number, because 311444013 - 2² = 311444009 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 (311444017) 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, 51907333 + ... + 51907338.

It is an arithmetic number, because the mean of its divisors is an integer number (103814672).

Almost surely, 2^311444013 is an apocalyptic number.

It is an amenable number.

311444013 is a deficient number, since it is larger than the sum of its proper divisors (103814675).

311444013 is a wasteful number, since it uses less digits than its factorization.

311444013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103814674.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 311444013 is about 17647.7764321741. The cubic root of 311444013 is about 677.8391709615.

Adding to 311444013 its reverse (310444113), we get a palindrome (621888126).

The spelling of 311444013 in words is "three hundred eleven million, four hundred forty-four thousand, thirteen".