2161144049 has 8 divisors (see below), whose sum is σ = 2191637280. Its totient is φ = 2130674976.

The previous prime is 2161144031. The next prime is 2161144109. The reversal of 2161144049 is 9404411612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161144049 is a prime.

It is a super-2 number, since 2×2161144049² = 9341087201056228802, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2161141049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248822 + ... + 257360.

It is an arithmetic number, because the mean of its divisors is an integer number (273954660).

Almost surely, 2^2161144049 is an apocalyptic number.

It is an amenable number.

2161144049 is a deficient number, since it is larger than the sum of its proper divisors (30493231).

2161144049 is an equidigital number, since it uses as much as digits as its factorization.

2161144049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12079.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 2161144049 is about 46488.1065327466. The cubic root of 2161144049 is about 1292.8889940027. Note that the first 3 decimals are identical.

The spelling of 2161144049 in words is "two billion, one hundred sixty-one million, one hundred forty-four thousand, forty-nine".