2105531001 has 12 divisors (see below), whose sum is σ = 3475797312. Its totient is φ = 1203160536.

The previous prime is 2105530979. The next prime is 2105531011. The reversal of 2105531001 is 1001355012.

2105531001 is a `hidden beast` number, since 2 + 10 + 553 + 100 + 1 = 666.

It is not a de Polignac number, because 2105531001 - 2²⁷ = 1971313273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2105531011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16710501 + ... + 16710626.

It is an arithmetic number, because the mean of its divisors is an integer number (289649776).

Almost surely, 2^2105531001 is an apocalyptic number.

2105531001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2105531001 is a deficient number, since it is larger than the sum of its proper divisors (1370266311).

2105531001 is a wasteful number, since it uses less digits than its factorization.

2105531001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33421140 (or 33421137 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 2105531001 is about 45886.0654338548. The cubic root of 2105531001 is about 1281.7024467972.

Adding to 2105531001 its reverse (1001355012), we get a palindrome (3106886013).

The spelling of 2105531001 in words is "two billion, one hundred five million, five hundred thirty-one thousand, one".