2106521717 has 8 divisors (see below), whose sum is σ = 2154288000. Its totient is φ = 2058878304.

The previous prime is 2106521713. The next prime is 2106521759. The reversal of 2106521717 is 7171256012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2106521717 - 2² = 2106521713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106521713) 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, 4409 + ... + 65057.

It is an arithmetic number, because the mean of its divisors is an integer number (269286000).

Almost surely, 2^2106521717 is an apocalyptic number.

It is an amenable number.

2106521717 is a deficient number, since it is larger than the sum of its proper divisors (47766283).

2106521717 is an equidigital number, since it uses as much as digits as its factorization.

2106521717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61435.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 2106521717 is about 45896.8595548759. The cubic root of 2106521717 is about 1281.9034418609.

Adding to 2106521717 its reverse (7171256012), we get a palindrome (9277777729).

The spelling of 2106521717 in words is "two billion, one hundred six million, five hundred twenty-one thousand, seven hundred seventeen".