2161291435 has 16 divisors (see below), whose sum is σ = 2623420800. Its totient is φ = 1709162496.

The previous prime is 2161291421. The next prime is 2161291441. The reversal of 2161291435 is 5341921612.

It is a cyclic number.

It is not a de Polignac number, because 2161291435 - 2¹⁵ = 2161258667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2161291435.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 501771 + ... + 506059.

It is an arithmetic number, because the mean of its divisors is an integer number (163963800).

Almost surely, 2^2161291435 is an apocalyptic number.

2161291435 is a deficient number, since it is larger than the sum of its proper divisors (462129365).

2161291435 is a wasteful number, since it uses less digits than its factorization.

2161291435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5430.

The product of its digits is 12960, while the sum is 34.

The square root of 2161291435 is about 46489.6917068720. The cubic root of 2161291435 is about 1292.9183842085.

The spelling of 2161291435 in words is "two billion, one hundred sixty-one million, two hundred ninety-one thousand, four hundred thirty-five".