311324431 has 4 divisors (see below), whose sum is σ = 339626664. Its totient is φ = 283022200.

The previous prime is 311324393. The next prime is 311324459. The reversal of 311324431 is 134423113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311324431 - 2⁷ = 311324303 is a prime.

It is a super-2 number, since 2×311324431² = 193845802674947522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311324471) 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, 14151100 + ... + 14151121.

It is an arithmetic number, because the mean of its divisors is an integer number (84906666).

Almost surely, 2^311324431 is an apocalyptic number.

311324431 is a deficient number, since it is larger than the sum of its proper divisors (28302233).

311324431 is a wasteful number, since it uses less digits than its factorization.

311324431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28302232.

The product of its digits is 864, while the sum is 22.

The square root of 311324431 is about 17644.3880880012. The cubic root of 311324431 is about 677.7524055110.

Adding to 311324431 its reverse (134423113), we get a palindrome (445747544).

The spelling of 311324431 in words is "three hundred eleven million, three hundred twenty-four thousand, four hundred thirty-one".