2165503530 has 32 divisors (see below), whose sum is σ = 5470747200. Its totient is φ = 547074432.

The previous prime is 2165503517. The next prime is 2165503547. The reversal of 2165503530 is 353055612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1898995 + ... + 1900134.

It is an arithmetic number, because the mean of its divisors is an integer number (170960850).

Almost surely, 2^2165503530 is an apocalyptic number.

2165503530 is an abundant number, since it is smaller than the sum of its proper divisors (3305243670).

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

2165503530 is a wasteful number, since it uses less digits than its factorization.

2165503530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799158.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 2165503530 is about 46534.9710432917. The cubic root of 2165503530 is about 1293.7577528999.

The spelling of 2165503530 in words is "two billion, one hundred sixty-five million, five hundred three thousand, five hundred thirty".