3111312131 has 4 divisors (see below), whose sum is σ = 3113261952. Its totient is φ = 3109362312.

The previous prime is 3111312121. The next prime is 3111312133. The reversal of 3111312131 is 1312131113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111312131 is a prime.

It is a super-2 number, since 2×3111312131² = 19360526353015522322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3111312133) 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 3 ways as a sum of consecutive naturals, for example, 972515 + ... + 975708.

It is an arithmetic number, because the mean of its divisors is an integer number (778315488).

Almost surely, 2^3111312131 is an apocalyptic number.

3111312131 is a deficient number, since it is larger than the sum of its proper divisors (1949821).

3111312131 is a wasteful number, since it uses less digits than its factorization.

3111312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949820.

The product of its digits is 54, while the sum is 17.

The square root of 3111312131 is about 55779.1370585813. The cubic root of 3111312131 is about 1459.8711544206.

Adding to 3111312131 its reverse (1312131113), we get a palindrome (4423443244).

The spelling of 3111312131 in words is "three billion, one hundred eleven million, three hundred twelve thousand, one hundred thirty-one".