2165533 has 2 divisors, whose sum is σ = 2165534. Its totient is φ = 2165532.

The previous prime is 2165531. The next prime is 2165543. The reversal of 2165533 is 3355612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1295044 + 870489 = 1138^2 + 933^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165533 - 2¹ = 2165531 is a prime.

Together with 2165531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2165498 and 2165507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082766 + 1082767.

It is an arithmetic number, because the mean of its divisors is an integer number (1082767).

2^2165533 is an apocalyptic number.

It is an amenable number.

2165533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165533 is an equidigital number, since it uses as much as digits as its factorization.

2165533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 2165533 is about 1471.5750065831. The cubic root of 2165533 is about 129.3763621723.

The spelling of 2165533 in words is "two million, one hundred sixty-five thousand, five hundred thirty-three".