2165231332 has 24 divisors (see below), whose sum is σ = 4266968832. Its totient is φ = 952447200.

The previous prime is 2165231287. The next prime is 2165231357. The reversal of 2165231332 is 2331325612.

It is a self number, because there is not a number n which added to its sum of digits gives 2165231332.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792343 + ... + 795070.

It is an arithmetic number, because the mean of its divisors is an integer number (177790368).

Almost surely, 2^2165231332 is an apocalyptic number.

2165231332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2165231332 is a deficient number, since it is larger than the sum of its proper divisors (2101737500).

2165231332 is a wasteful number, since it uses less digits than its factorization.

2165231332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587459 (or 1587457 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 2165231332 is about 46532.0462907016. The cubic root of 2165231332 is about 1293.7035433325.

Adding to 2165231332 its reverse (2331325612), we get a palindrome (4496556944).

The spelling of 2165231332 in words is "two billion, one hundred sixty-five million, two hundred thirty-one thousand, three hundred thirty-two".