2161400211 has 6 divisors (see below), whose sum is σ = 3122022540. Its totient is φ = 1440933468.

The previous prime is 2161400161. The next prime is 2161400221. The reversal of 2161400211 is 1120041612.

It is not a de Polignac number, because 2161400211 - 2⁶ = 2161400147 is a prime.

It is a super-2 number, since 2×2161400211² = 9343301744221689042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2161400221) 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 5 ways as a sum of consecutive naturals, for example, 120077781 + ... + 120077798.

It is an arithmetic number, because the mean of its divisors is an integer number (520337090).

Almost surely, 2^2161400211 is an apocalyptic number.

2161400211 is a deficient number, since it is larger than the sum of its proper divisors (960622329).

2161400211 is a wasteful number, since it uses less digits than its factorization.

2161400211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240155585 (or 240155582 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2161400211 is about 46490.8615859074. The cubic root of 2161400211 is about 1292.9400743469.

Adding to 2161400211 its reverse (1120041612), we get a palindrome (3281441823).

The spelling of 2161400211 in words is "two billion, one hundred sixty-one million, four hundred thousand, two hundred eleven".