2165051580 has 48 divisors (see below), whose sum is σ = 6066827424. Its totient is φ = 576901120.

The previous prime is 2165051561. The next prime is 2165051587. The reversal of 2165051580 is 851505612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165051587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68404 + ... + 94916.

It is an arithmetic number, because the mean of its divisors is an integer number (126392238).

Almost surely, 2^2165051580 is an apocalyptic number.

2165051580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165051580 is an abundant number, since it is smaller than the sum of its proper divisors (3901775844).

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

2165051580 is a wasteful number, since it uses less digits than its factorization.

2165051580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27886 (or 27884 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 2165051580 is about 46530.1147645264. The cubic root of 2165051580 is about 1293.6677423488.

The spelling of 2165051580 in words is "two billion, one hundred sixty-five million, fifty-one thousand, five hundred eighty".