2168881 has 16 divisors (see below), whose sum is σ = 2640960. Its totient is φ = 1753920.

The previous prime is 2168879. The next prime is 2168893. The reversal of 2168881 is 1888612.

It is not a de Polignac number, because 2168881 - 2¹ = 2168879 is a prime.

It is a super-2 number, since 2×2168881² = 9408089584322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3886 + ... + 4408.

It is an arithmetic number, because the mean of its divisors is an integer number (165060).

2^2168881 is an apocalyptic number.

It is an amenable number.

2168881 is a deficient number, since it is larger than the sum of its proper divisors (472079).

2168881 is a wasteful number, since it uses less digits than its factorization.

2168881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576.

The product of its digits is 6144, while the sum is 34.

The square root of 2168881 is about 1472.7121239400. The cubic root of 2168881 is about 129.4430015059.

The spelling of 2168881 in words is "two million, one hundred sixty-eight thousand, eight hundred eighty-one".