2161192043 has 4 divisors (see below), whose sum is σ = 2168829048. Its totient is φ = 2153555040.

The previous prime is 2161192039. The next prime is 2161192049. The reversal of 2161192043 is 3402911612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2161192043 - 2² = 2161192039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161191997 and 2161192015.

It is not an unprimeable number, because it can be changed into a prime (2161192049) 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 3 ways as a sum of consecutive naturals, for example, 3818078 + ... + 3818643.

It is an arithmetic number, because the mean of its divisors is an integer number (542207262).

Almost surely, 2^2161192043 is an apocalyptic number.

2161192043 is a deficient number, since it is larger than the sum of its proper divisors (7637005).

2161192043 is an equidigital number, since it uses as much as digits as its factorization.

2161192043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637004.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2161192043 is about 46488.6227264263. The cubic root of 2161192043 is about 1292.8985646211.

The spelling of 2161192043 in words is "two billion, one hundred sixty-one million, one hundred ninety-two thousand, forty-three".