2165213 has 2 divisors, whose sum is σ = 2165214. Its totient is φ = 2165212.

The previous prime is 2165201. The next prime is 2165231. The reversal of 2165213 is 3125612.

Together with next prime (2165231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2079364 + 85849 = 1442^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165213 - 2¹⁶ = 2099677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082606 + 1082607.

It is an arithmetic number, because the mean of its divisors is an integer number (1082607).

2^2165213 is an apocalyptic number.

It is an amenable number.

2165213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165213 is an equidigital number, since it uses as much as digits as its factorization.

2165213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 2165213 is about 1471.4662755225. The cubic root of 2165213 is about 129.3699892261.

The spelling of 2165213 in words is "two million, one hundred sixty-five thousand, two hundred thirteen".