2131189 has 4 divisors (see below), whose sum is σ = 2136256. Its totient is φ = 2126124.

The previous prime is 2131141. The next prime is 2131193. The reversal of 2131189 is 9811312.

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 2131189 - 2¹⁹ = 1606901 is a prime.

It is a Duffinian number.

2131189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131109) 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, 1839 + ... + 2764.

It is an arithmetic number, because the mean of its divisors is an integer number (534064).

2^2131189 is an apocalyptic number.

It is an amenable number.

2131189 is a deficient number, since it is larger than the sum of its proper divisors (5067).

2131189 is an equidigital number, since it uses as much as digits as its factorization.

2131189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066.

The product of its digits is 432, while the sum is 25.

The square root of 2131189 is about 1459.8592397899. The cubic root of 2131189 is about 128.6887715906.

The spelling of 2131189 in words is "two million, one hundred thirty-one thousand, one hundred eighty-nine".