2171320236 has 48 divisors (see below), whose sum is σ = 5641534080. Its totient is φ = 722206800.

The previous prime is 2171320211. The next prime is 2171320253. The reversal of 2171320236 is 6320231712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28911 + ... + 71961.

It is an arithmetic number, because the mean of its divisors is an integer number (117531960).

Almost surely, 2^2171320236 is an apocalyptic number.

It is an amenable number.

2171320236 is an abundant number, since it is smaller than the sum of its proper divisors (3470213844).

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

2171320236 is a wasteful number, since it uses less digits than its factorization.

2171320236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43531 (or 43523 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 2171320236 is about 46597.4273538787. The cubic root of 2171320236 is about 1294.9150942877.

Adding to 2171320236 its reverse (6320231712), we get a palindrome (8491551948).

The spelling of 2171320236 in words is "two billion, one hundred seventy-one million, three hundred twenty thousand, two hundred thirty-six".