2165455 has 8 divisors (see below), whose sum is σ = 2615472. Its totient is φ = 1721088.

The previous prime is 2165453. The next prime is 2165461. The reversal of 2165455 is 5545612.

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 2165455 - 2¹ = 2165453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165453) 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, 514 + ... + 2143.

It is an arithmetic number, because the mean of its divisors is an integer number (326934).

It is the magic constant of a 163 × 163 magic square.

2^2165455 is an apocalyptic number.

2165455 is a deficient number, since it is larger than the sum of its proper divisors (450017).

2165455 is a wasteful number, since it uses less digits than its factorization.

2165455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825.

The product of its digits is 6000, while the sum is 28.

The square root of 2165455 is about 1471.5485041275. The cubic root of 2165455 is about 129.3748088245.

It can be divided in two parts, 216 and 5455, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 2165455 in words is "two million, one hundred sixty-five thousand, four hundred fifty-five".