105660217 has 8 divisors (see below), whose sum is σ = 115935624. Its totient is φ = 95691648.

The previous prime is 105660211. The next prime is 105660251. The reversal of 105660217 is 712066501.

It can be written as a sum of positive squares in 4 ways, for example, as 30647296 + 75012921 = 5536^2 + 8661^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-105660217 is a prime.

It is a super-2 number, since 2×105660217² = 22328162912974178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105660211) 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, 75988 + ... + 77365.

It is an arithmetic number, because the mean of its divisors is an integer number (14491953).

Almost surely, 2^105660217 is an apocalyptic number.

It is an amenable number.

105660217 is a deficient number, since it is larger than the sum of its proper divisors (10275407).

105660217 is a wasteful number, since it uses less digits than its factorization.

105660217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153419.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 105660217 is about 10279.1155747953. The cubic root of 105660217 is about 472.7561270121.

The spelling of 105660217 in words is "one hundred five million, six hundred sixty thousand, two hundred seventeen".