2105442511 has 4 divisors (see below), whose sum is σ = 2139958024. Its totient is φ = 2070927000.

The previous prime is 2105442461. The next prime is 2105442523. The reversal of 2105442511 is 1152445012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105442511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105442551) 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 3 ways as a sum of consecutive naturals, for example, 17257665 + ... + 17257786.

It is an arithmetic number, because the mean of its divisors is an integer number (534989506).

Almost surely, 2^2105442511 is an apocalyptic number.

2105442511 is a deficient number, since it is larger than the sum of its proper divisors (34515513).

2105442511 is an equidigital number, since it uses as much as digits as its factorization.

2105442511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34515512.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2105442511 is about 45885.1011876404. The cubic root of 2105442511 is about 1281.6844910038.

Adding to 2105442511 its reverse (1152445012), we get a palindrome (3257887523).

The spelling of 2105442511 in words is "two billion, one hundred five million, four hundred forty-two thousand, five hundred eleven".