3111143691 has 48 divisors (see below), whose sum is σ = 4459392000. Its totient is φ = 1928515776.

The previous prime is 3111143687. The next prime is 3111143699. The reversal of 3111143691 is 1963411113.

It is not a de Polignac number, because 3111143691 - 2² = 3111143687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3111143699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13951206 + ... + 13951428.

It is an arithmetic number, because the mean of its divisors is an integer number (92904000).

Almost surely, 2^3111143691 is an apocalyptic number.

3111143691 is a deficient number, since it is larger than the sum of its proper divisors (1348248309).

3111143691 is a wasteful number, since it uses less digits than its factorization.

3111143691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 457 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 3111143691 is about 55777.6271546218. The cubic root of 3111143691 is about 1459.8448091441.

The spelling of 3111143691 in words is "three billion, one hundred eleven million, one hundred forty-three thousand, six hundred ninety-one".