311044013 has 12 divisors (see below), whose sum is σ = 364002912. Its totient is φ = 265005720.

The previous prime is 311044009. The next prime is 311044031. The reversal of 311044013 is 310440113.

It is not a de Polignac number, because 311044013 - 2² = 311044009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311043982 and 311044000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311044043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10823 + ... + 27188.

It is an arithmetic number, because the mean of its divisors is an integer number (30333576).

Almost surely, 2^311044013 is an apocalyptic number.

It is an amenable number.

311044013 is a deficient number, since it is larger than the sum of its proper divisors (52958899).

311044013 is a wasteful number, since it uses less digits than its factorization.

311044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38192 (or 38185 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 311044013 is about 17636.4399185323. The cubic root of 311044013 is about 677.5488546534.

Adding to 311044013 its reverse (310440113), we get a palindrome (621484126).

The spelling of 311044013 in words is "three hundred eleven million, forty-four thousand, thirteen".