2105521055 has 16 divisors (see below), whose sum is σ = 2757276288. Its totient is φ = 1530756000.

The previous prime is 2105521037. The next prime is 2105521109. The reversal of 2105521055 is 5501255012.

It is a de Polignac number, because none of the positive numbers 2^k-2105521055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227060 + ... + 236150.

It is an arithmetic number, because the mean of its divisors is an integer number (172329768).

Almost surely, 2^2105521055 is an apocalyptic number.

2105521055 is a deficient number, since it is larger than the sum of its proper divisors (651755233).

2105521055 is a wasteful number, since it uses less digits than its factorization.

2105521055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13318.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 2105521055 is about 45885.9570565985. The cubic root of 2105521055 is about 1281.7004286471.

Adding to 2105521055 its reverse (5501255012), we get a palindrome (7606776067).

The spelling of 2105521055 in words is "two billion, one hundred five million, five hundred twenty-one thousand, fifty-five".