2189511 has 10 divisors (see below), whose sum is σ = 3270872. Its totient is φ = 1459620.

The previous prime is 2189491. The next prime is 2189513. The reversal of 2189511 is 1159812.

It is not a de Polignac number, because 2189511 - 2¹¹ = 2187463 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189513) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13435 + ... + 13596.

2^2189511 is an apocalyptic number.

2189511 is a deficient number, since it is larger than the sum of its proper divisors (1081361).

2189511 is an equidigital number, since it uses as much as digits as its factorization.

2189511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27043 (or 27034 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 2189511 is about 1479.6996316821. The cubic root of 2189511 is about 129.8521198126.

The spelling of 2189511 in words is "two million, one hundred eighty-nine thousand, five hundred eleven".