2105171522 has 16 divisors (see below), whose sum is σ = 3169157400. Its totient is φ = 1048793088.

The previous prime is 2105171521. The next prime is 2105171561. The reversal of 2105171522 is 2251715012.

It can be written as a sum of positive squares in 4 ways, for example, as 1161514561 + 943656961 = 34081^2 + 30719^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2105171491 and 2105171500.

It is not an unprimeable number, because it can be changed into a prime (2105171521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984038 + ... + 986174.

Almost surely, 2^2105171522 is an apocalyptic number.

2105171522 is a deficient number, since it is larger than the sum of its proper divisors (1063985878).

2105171522 is a wasteful number, since it uses less digits than its factorization.

2105171522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 2105171522 is about 45882.1481842339. The cubic root of 2105171522 is about 1281.6295006160.

Adding to 2105171522 its reverse (2251715012), we get a palindrome (4356886534).

The spelling of 2105171522 in words is "two billion, one hundred five million, one hundred seventy-one thousand, five hundred twenty-two".