3111881 has 8 divisors (see below), whose sum is σ = 3179520. Its totient is φ = 3045168.

The previous prime is 3111863. The next prime is 3111931. The reversal of 3111881 is 1881113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3111881 - 2⁶ = 3111817 is a prime.

It is a super-2 number, since 2×3111881² = 19367606716322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3111821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13475 + ... + 13703.

It is an arithmetic number, because the mean of its divisors is an integer number (397440).

Almost surely, 2^3111881 is an apocalyptic number.

It is an amenable number.

3111881 is a deficient number, since it is larger than the sum of its proper divisors (67639).

3111881 is a wasteful number, since it uses less digits than its factorization.

3111881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its digits is 192, while the sum is 23.

The square root of 3111881 is about 1764.0524368624. The cubic root of 3111881 is about 145.9960122761.

Adding to 3111881 its reverse (1881113), we get a palindrome (4992994).

The spelling of 3111881 in words is "three million, one hundred eleven thousand, eight hundred eighty-one".