3111111 has 6 divisors (see below), whose sum is σ = 4493840. Its totient is φ = 2074068.

The previous prime is 3111107. The next prime is 3111131. The reversal of 3111111 is 1111113.

It is not a de Polignac number, because 3111111 - 2² = 3111107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 345679 = 3111111 / (3 + 1 + 1 + 1 + 1 + 1 + 1).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a Duffinian number.

3111111 is a modest number, since divided by 1111 gives 311 as remainder.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 3111093 and 3111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172831 + ... + 172848.

Almost surely, 2^3111111 is an apocalyptic number.

3111111 is a deficient number, since it is larger than the sum of its proper divisors (1382729).

3111111 is a wasteful number, since it uses less digits than its factorization.

3111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345685 (or 345682 counting only the distinct ones).

The product of its digits is 3, while the sum is 9.

The square root of 3111111 is about 1763.8341758794. The cubic root of 3111111 is about 145.9839695917.

Adding to 3111111 its reverse (1111113), we get a palindrome (4222224).

It can be divided in two parts, 3 and 111111, that multiplied together give a palindrome (333333).

The spelling of 3111111 in words is "three million, one hundred eleven thousand, one hundred eleven".