2161041743 has 4 divisors (see below), whose sum is σ = 2469762000. Its totient is φ = 1852321488.

The previous prime is 2161041733. The next prime is 2161041763. The reversal of 2161041743 is 3471401612.

It is a happy number.

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 2161041743 - 2¹⁰ = 2161040719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161041733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154360118 + ... + 154360131.

It is an arithmetic number, because the mean of its divisors is an integer number (617440500).

Almost surely, 2^2161041743 is an apocalyptic number.

2161041743 is a deficient number, since it is larger than the sum of its proper divisors (308720257).

2161041743 is an equidigital number, since it uses as much as digits as its factorization.

2161041743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308720256.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 2161041743 is about 46487.0061737686. The cubic root of 2161041743 is about 1292.8685924028.

The spelling of 2161041743 in words is "two billion, one hundred sixty-one million, forty-one thousand, seven hundred forty-three".