2165530 has 8 divisors (see below), whose sum is σ = 3897972. Its totient is φ = 866208.

The previous prime is 2165521. The next prime is 2165531. The reversal of 2165530 is 355612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2157961 + 7569 = 1469^2 + 87^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2165531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108267 + ... + 108286.

2^2165530 is an apocalyptic number.

2165530 is a deficient number, since it is larger than the sum of its proper divisors (1732442).

2165530 is a wasteful number, since it uses less digits than its factorization.

2165530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216560.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2165530 is about 1471.5739872667. The cubic root of 2165530 is about 129.3763024288.

The spelling of 2165530 in words is "two million, one hundred sixty-five thousand, five hundred thirty".