2165130 has 80 divisors (see below), whose sum is σ = 6377184. Its totient is φ = 524880.

The previous prime is 2165117. The next prime is 2165131. The reversal of 2165130 is 315612.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 196825 + ... + 196835.

2^2165130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2165130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3188592).

2165130 is an abundant number, since it is smaller than the sum of its proper divisors (4212054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165130 is an frugal number, since it uses more digits than its factorization.

2165130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2165130 is about 1471.4380720914. The cubic root of 2165130 is about 129.3683361407.

The spelling of 2165130 in words is "two million, one hundred sixty-five thousand, one hundred thirty".