2133665 has 8 divisors (see below), whose sum is σ = 2569320. Its totient is φ = 1700992.

The previous prime is 2133647. The next prime is 2133673. The reversal of 2133665 is 5663312.

It can be written as a sum of positive squares in 4 ways, for example, as 10816 + 2122849 = 104^2 + 1457^2 .

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 2133665 - 2⁶ = 2133601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1397 + ... + 2493.

It is an arithmetic number, because the mean of its divisors is an integer number (321165).

2^2133665 is an apocalyptic number.

It is an amenable number.

2133665 is a deficient number, since it is larger than the sum of its proper divisors (435655).

2133665 is a wasteful number, since it uses less digits than its factorization.

2133665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its digits is 3240, while the sum is 26.

The square root of 2133665 is about 1460.7070205897. The cubic root of 2133665 is about 128.7385888652.

Adding to 2133665 its reverse (5663312), we get a palindrome (7796977).

The spelling of 2133665 in words is "two million, one hundred thirty-three thousand, six hundred sixty-five".