2189651 has 8 divisors (see below), whose sum is σ = 2336544. Its totient is φ = 2044800.

The previous prime is 2189647. The next prime is 2189699. The reversal of 2189651 is 1569812.

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 2189651 - 2² = 2189647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2186651) 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, 2141 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (292068).

2^2189651 is an apocalyptic number.

2189651 is a deficient number, since it is larger than the sum of its proper divisors (146893).

2189651 is a wasteful number, since it uses less digits than its factorization.

2189651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021.

The product of its digits is 4320, while the sum is 32.

The square root of 2189651 is about 1479.7469378242. The cubic root of 2189651 is about 129.8548873879.

The spelling of 2189651 in words is "two million, one hundred eighty-nine thousand, six hundred fifty-one".