2166355 has 4 divisors (see below), whose sum is σ = 2599632. Its totient is φ = 1733080.

The previous prime is 2166319. The next prime is 2166403. The reversal of 2166355 is 5536612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2166355 - 2⁹ = 2165843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216631 + ... + 216640.

It is an arithmetic number, because the mean of its divisors is an integer number (649908).

2^2166355 is an apocalyptic number.

2166355 is a deficient number, since it is larger than the sum of its proper divisors (433277).

2166355 is an equidigital number, since it uses as much as digits as its factorization.

2166355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433276.

The product of its digits is 5400, while the sum is 28.

The square root of 2166355 is about 1471.8542726778. The cubic root of 2166355 is about 129.3927298004.

The spelling of 2166355 in words is "two million, one hundred sixty-six thousand, three hundred fifty-five".