2133891 has 16 divisors (see below), whose sum is σ = 3348000. Its totient is φ = 1338624.

The previous prime is 2133839. The next prime is 2133899. The reversal of 2133891 is 1983312.

It is not a de Polignac number, because 2133891 - 2⁹ = 2133379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2133899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1866 + ... + 2783.

It is an arithmetic number, because the mean of its divisors is an integer number (209250).

2^2133891 is an apocalyptic number.

2133891 is a deficient number, since it is larger than the sum of its proper divisors (1214109).

2133891 is a wasteful number, since it uses less digits than its factorization.

2133891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675 (or 4669 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 2133891 is about 1460.7843783393. The cubic root of 2133891 is about 128.7431340795.

The spelling of 2133891 in words is "two million, one hundred thirty-three thousand, eight hundred ninety-one".