2102805361 has 16 divisors (see below), whose sum is σ = 2318727168. Its totient is φ = 1898265600.

The previous prime is 2102805347. The next prime is 2102805379. The reversal of 2102805361 is 1635082012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102805361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102800361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41896 + ... + 77206.

It is an arithmetic number, because the mean of its divisors is an integer number (144920448).

Almost surely, 2^2102805361 is an apocalyptic number.

It is an amenable number.

2102805361 is a deficient number, since it is larger than the sum of its proper divisors (215921807).

2102805361 is a wasteful number, since it uses less digits than its factorization.

2102805361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35472.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2102805361 is about 45856.3557317849. The cubic root of 2102805361 is about 1281.1491472597.

Adding to 2102805361 its reverse (1635082012), we get a palindrome (3737887373).

The spelling of 2102805361 in words is "two billion, one hundred two million, eight hundred five thousand, three hundred sixty-one".