2105531136 has 108 divisors (see below), whose sum is σ = 6334871088. Its totient is φ = 671311872.

The previous prime is 2105531059. The next prime is 2105531137. The reversal of 2105531136 is 6311355012.

It is a super-2 number, since 2×2105531136² = 8866522729330900992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2105531137) 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 11 ways as a sum of consecutive naturals, for example, 33126 + ... + 72858.

Almost surely, 2^2105531136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2105531136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3167435544).

2105531136 is an abundant number, since it is smaller than the sum of its proper divisors (4229339952).

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

2105531136 is a wasteful number, since it uses less digits than its factorization.

2105531136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39778 (or 39761 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 2105531136 is about 45886.0669048895. The cubic root of 2105531136 is about 1281.7024741901.

Adding to 2105531136 its reverse (6311355012), we get a palindrome (8416886148).

The spelling of 2105531136 in words is "two billion, one hundred five million, five hundred thirty-one thousand, one hundred thirty-six".