2189551 has 8 divisors (see below), whose sum is σ = 2694944. Its totient is φ = 1732320.

The previous prime is 2189543. The next prime is 2189563. The reversal of 2189551 is 1559812.

2189551 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2189551 - 2³ = 2189543 is a prime.

2189551 is strictly pandigital in base 8.

2189551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11940 + ... + 12121.

It is an arithmetic number, because the mean of its divisors is an integer number (336868).

2^2189551 is an apocalyptic number.

2189551 is a deficient number, since it is larger than the sum of its proper divisors (505393).

2189551 is a wasteful number, since it uses less digits than its factorization.

2189551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24081.

The product of its digits is 3600, while the sum is 31.

The square root of 2189551 is about 1479.7131478770. The cubic root of 2189551 is about 129.8529105604.

The spelling of 2189551 in words is "two million, one hundred eighty-nine thousand, five hundred fifty-one".