2105512455 has 32 divisors (see below), whose sum is σ = 3596106240. Its totient is φ = 1048844160.

The previous prime is 2105512349. The next prime is 2105512459. The reversal of 2105512455 is 5542155012.

It is not a de Polignac number, because 2105512455 - 2⁹ = 2105511943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105512459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31792 + ... + 72261.

It is an arithmetic number, because the mean of its divisors is an integer number (112378320).

Almost surely, 2^2105512455 is an apocalyptic number.

2105512455 is a deficient number, since it is larger than the sum of its proper divisors (1490593785).

2105512455 is a wasteful number, since it uses less digits than its factorization.

2105512455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104151.

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 2105512455 is about 45885.8633459152. The cubic root of 2105512455 is about 1281.6986836097.

Adding to 2105512455 its reverse (5542155012), we get a palindrome (7647667467).

The spelling of 2105512455 in words is "two billion, one hundred five million, five hundred twelve thousand, four hundred fifty-five".