2161000333 has 2 divisors, whose sum is σ = 2161000334. Its totient is φ = 2161000332.

The previous prime is 2161000307. The next prime is 2161000363. The reversal of 2161000333 is 3330001612.

2161000333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2033829604 + 127170729 = 45098^2 + 11277^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161000333 - 2⁵ = 2161000301 is a prime.

It is a super-2 number, since 2×2161000333² = 9339844878452221778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2161000333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161000363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080500166 + 1080500167.

It is an arithmetic number, because the mean of its divisors is an integer number (1080500167).

Almost surely, 2^2161000333 is an apocalyptic number.

It is an amenable number.

2161000333 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161000333 is an equidigital number, since it uses as much as digits as its factorization.

2161000333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 2161000333 is about 46486.5607783583. The cubic root of 2161000333 is about 1292.8603343438.

Adding to 2161000333 its reverse (3330001612), we get a palindrome (5491001945).

The spelling of 2161000333 in words is "two billion, one hundred sixty-one million, three hundred thirty-three", and thus it is an aban number.