2164731841 has 4 divisors (see below), whose sum is σ = 2205575892. Its totient is φ = 2123887792.

The previous prime is 2164731799. The next prime is 2164731913. The reversal of 2164731841 is 1481374612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1953640000 + 211091841 = 44200^2 + 14529^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164731841 - 2⁷ = 2164731713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2164731841.

It is not an unprimeable number, because it can be changed into a prime (2164738841) 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, 20421946 + ... + 20422051.

It is an arithmetic number, because the mean of its divisors is an integer number (551393973).

Almost surely, 2^2164731841 is an apocalyptic number.

It is an amenable number.

2164731841 is a deficient number, since it is larger than the sum of its proper divisors (40844051).

2164731841 is an equidigital number, since it uses as much as digits as its factorization.

2164731841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40844050.

The product of its digits is 32256, while the sum is 37.

The square root of 2164731841 is about 46526.6788090446. The cubic root of 2164731841 is about 1293.6040554298.

The spelling of 2164731841 in words is "two billion, one hundred sixty-four million, seven hundred thirty-one thousand, eight hundred forty-one".