2105531311 has 16 divisors (see below), whose sum is σ = 2404479168. Its totient is φ = 1826496000.

The previous prime is 2105531269. The next prime is 2105531317. The reversal of 2105531311 is 1131355012.

It is a cyclic number.

It is not a de Polignac number, because 2105531311 - 2⁹ = 2105530799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105531317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148126 + ... + 161716.

It is an arithmetic number, because the mean of its divisors is an integer number (150279948).

Almost surely, 2^2105531311 is an apocalyptic number.

2105531311 is a deficient number, since it is larger than the sum of its proper divisors (298947857).

2105531311 is a wasteful number, since it uses less digits than its factorization.

2105531311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14322.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 2105531311 is about 45886.0688117864. The cubic root of 2105531311 is about 1281.7025096994.

Adding to 2105531311 its reverse (1131355012), we get a palindrome (3236886323).

The spelling of 2105531311 in words is "two billion, one hundred five million, five hundred thirty-one thousand, three hundred eleven".