2013881 has 4 divisors (see below), whose sum is σ = 2017152. Its totient is φ = 2010612.

The previous prime is 2013877. The next prime is 2013889. The reversal of 2013881 is 1883102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2013881 - 2² = 2013877 is a prime.

It is a super-2 number, since 2×2013881² = 8111433364322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2013889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401 + ... + 2046.

It is an arithmetic number, because the mean of its divisors is an integer number (504288).

2^2013881 is an apocalyptic number.

It is an amenable number.

2013881 is a deficient number, since it is larger than the sum of its proper divisors (3271).

2013881 is an equidigital number, since it uses as much as digits as its factorization.

2013881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2013881 is about 1419.1127509821. The cubic root of 2013881 is about 126.2829159673.

Adding to 2013881 its reverse (1883102), we get a palindrome (3896983).

The spelling of 2013881 in words is "two million, thirteen thousand, eight hundred eighty-one".