2164551 has 8 divisors (see below), whose sum is σ = 2895984. Its totient is φ = 1438080.

The previous prime is 2164529. The next prime is 2164571. The reversal of 2164551 is 1554612.

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

It is not a de Polignac number, because 2164551 - 2⁹ = 2164039 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164501) 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, 60 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (361998).

2^2164551 is an apocalyptic number.

2164551 is a deficient number, since it is larger than the sum of its proper divisors (731433).

2164551 is a wasteful number, since it uses less digits than its factorization.

2164551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its digits is 1200, while the sum is 24.

The square root of 2164551 is about 1471.2413126337. The cubic root of 2164551 is about 129.3568032005.

The spelling of 2164551 in words is "two million, one hundred sixty-four thousand, five hundred fifty-one".