311240313 has 20 divisors (see below), whose sum is σ = 465429888. Its totient is φ = 207274680.

The previous prime is 311240261. The next prime is 311240339. The reversal of 311240313 is 313042113.

311240313 is a `hidden beast` number, since 311 + 2 + 40 + 313 = 666.

It is not a de Polignac number, because 311240313 - 2²⁰ = 310191737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311248313) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 121120 + ... + 123662.

Almost surely, 2^311240313 is an apocalyptic number.

It is an amenable number.

311240313 is a deficient number, since it is larger than the sum of its proper divisors (154189575).

311240313 is a wasteful number, since it uses less digits than its factorization.

311240313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4057 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 311240313 is about 17642.0042228767. The cubic root of 311240313 is about 677.6913584632.

Adding to 311240313 its reverse (313042113), we get a palindrome (624282426).

The spelling of 311240313 in words is "three hundred eleven million, two hundred forty thousand, three hundred thirteen".