2165132730 has 16 divisors (see below), whose sum is σ = 5196318624. Its totient is φ = 577368720.

The previous prime is 2165132701. The next prime is 2165132731. The reversal of 2165132730 is 372315612.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 72171091 = 2165132730 / (2 + 1 + 6 + 5 + 1 + 3 + 2 + 7 + 3 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2165132731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36085516 + ... + 36085575.

It is an arithmetic number, because the mean of its divisors is an integer number (324769914).

Almost surely, 2^2165132730 is an apocalyptic number.

2165132730 is an abundant number, since it is smaller than the sum of its proper divisors (3031185894).

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

2165132730 is a wasteful number, since it uses less digits than its factorization.

2165132730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72171101.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 2165132730 is about 46530.9867722575. The cubic root of 2165132730 is about 1293.6839051394.

The spelling of 2165132730 in words is "two billion, one hundred sixty-five million, one hundred thirty-two thousand, seven hundred thirty".