2105171523 has 48 divisors (see below), whose sum is σ = 3962702016. Its totient is φ = 1045094400.

The previous prime is 2105171521. The next prime is 2105171561. The reversal of 2105171523 is 3251715012.

2105171523 is a `hidden beast` number, since 21 + 0 + 51 + 71 + 523 = 666.

It is not a de Polignac number, because 2105171523 - 2¹ = 2105171521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105171521) 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 47 ways as a sum of consecutive naturals, for example, 61678 + ... + 89523.

It is an arithmetic number, because the mean of its divisors is an integer number (82556292).

Almost surely, 2^2105171523 is an apocalyptic number.

2105171523 is a deficient number, since it is larger than the sum of its proper divisors (1857530493).

2105171523 is a wasteful number, since it uses less digits than its factorization.

2105171523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151244 (or 151241 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 2105171523 is about 45882.1481951314. The cubic root of 2105171523 is about 1281.6295008189.

Adding to 2105171523 its reverse (3251715012), we get a palindrome (5356886535).

The spelling of 2105171523 in words is "two billion, one hundred five million, one hundred seventy-one thousand, five hundred twenty-three".