2105542145 has 32 divisors (see below), whose sum is σ = 2942438400. Its totient is φ = 1416482496.

The previous prime is 2105542141. The next prime is 2105542163. The reversal of 2105542145 is 5412455012.

It is a cyclic number.

It is not a de Polignac number, because 2105542145 - 2² = 2105542141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2105542141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1773242 + ... + 1774428.

It is an arithmetic number, because the mean of its divisors is an integer number (91951200).

Almost surely, 2^2105542145 is an apocalyptic number.

It is an amenable number.

2105542145 is a deficient number, since it is larger than the sum of its proper divisors (836896255).

2105542145 is a wasteful number, since it uses less digits than its factorization.

2105542145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 2105542145 is about 45886.1868648943. The cubic root of 2105542145 is about 1281.7047080267.

Adding to 2105542145 its reverse (5412455012), we get a palindrome (7517997157).

The spelling of 2105542145 in words is "two billion, one hundred five million, five hundred forty-two thousand, one hundred forty-five".