2105542520 has 16 divisors (see below), whose sum is σ = 4737470760. Its totient is φ = 842216992.

The previous prime is 2105542507. The next prime is 2105542529. The reversal of 2105542520 is 252455012.

It is a self number, because there is not a number n which added to its sum of digits gives 2105542520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105542529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26319242 + ... + 26319321.

Almost surely, 2^2105542520 is an apocalyptic number.

2105542520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105542520 is an abundant number, since it is smaller than the sum of its proper divisors (2631928240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2105542520 is a wasteful number, since it uses less digits than its factorization.

2105542520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52638574 (or 52638570 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2105542520 is about 45886.1909510912. The cubic root of 2105542520 is about 1281.7047841179.

Adding to 2105542520 its reverse (252455012), we get a palindrome (2357997532).

The spelling of 2105542520 in words is "two billion, one hundred five million, five hundred forty-two thousand, five hundred twenty".