311138811 has 12 divisors (see below), whose sum is σ = 475859592. Its totient is φ = 195224256.

The previous prime is 311138797. The next prime is 311138837. The reversal of 311138811 is 118831113.

It is not a de Polignac number, because 311138811 - 2⁶ = 311138747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311138881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1016641 + ... + 1016946.

It is an arithmetic number, because the mean of its divisors is an integer number (39654966).

Almost surely, 2^311138811 is an apocalyptic number.

311138811 is a deficient number, since it is larger than the sum of its proper divisors (164720781).

311138811 is a wasteful number, since it uses less digits than its factorization.

311138811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033610 (or 2033607 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 311138811 is about 17639.1272743296. The cubic root of 311138811 is about 677.6176806603.

Adding to 311138811 its reverse (118831113), we get a palindrome (429969924).

The spelling of 311138811 in words is "three hundred eleven million, one hundred thirty-eight thousand, eight hundred eleven".