2161020216 has 32 divisors (see below), whose sum is σ = 5409277200. Its totient is φ = 719443200.

The previous prime is 2161020203. The next prime is 2161020217. The reversal of 2161020216 is 6120201612.

It is a junction number, because it is equal to n+sod(n) for n = 2161020192 and 2161020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161020217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 36235 + ... + 75066.

Almost surely, 2^2161020216 is an apocalyptic number.

It is an amenable number.

2161020216 is an abundant number, since it is smaller than the sum of its proper divisors (3248256984).

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

2161020216 is a wasteful number, since it uses less digits than its factorization.

2161020216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112119 (or 112115 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2161020216 is about 46486.7746353734. The cubic root of 2161020216 is about 1292.8642994617.

Adding to 2161020216 its reverse (6120201612), we get a palindrome (8281221828).

The spelling of 2161020216 in words is "two billion, one hundred sixty-one million, twenty thousand, two hundred sixteen".