2105171499 has 16 divisors (see below), whose sum is σ = 2884504608. Its totient is φ = 1364689152.

The previous prime is 2105171491. The next prime is 2105171521. The reversal of 2105171499 is 9941715012.

It is not a de Polignac number, because 2105171499 - 2³ = 2105171491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105171491) 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, 216919 + ... + 226415.

It is an arithmetic number, because the mean of its divisors is an integer number (180281538).

Almost surely, 2^2105171499 is an apocalyptic number.

2105171499 is a deficient number, since it is larger than the sum of its proper divisors (779333109).

2105171499 is a wasteful number, since it uses less digits than its factorization.

2105171499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11534.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 2105171499 is about 45882.1479335918. The cubic root of 2105171499 is about 1281.6294959485.

It can be divided in two parts, 2 and 105171499, that added together give a palindrome (105171501).

The spelling of 2105171499 in words is "two billion, one hundred five million, one hundred seventy-one thousand, four hundred ninety-nine".