105521562217 has 4 divisors (see below), whose sum is σ = 107975552080. Its totient is φ = 103067572356.

The previous prime is 105521562203. The next prime is 105521562233. The reversal of 105521562217 is 712265125501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712265125501 = 31 ⋅22976294371.

It is a cyclic number.

It is not a de Polignac number, because 105521562217 - 2¹⁹ = 105521037929 is a prime.

It is a super-2 number, since 2×105521562217² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105521562247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226994867 + ... + 1226994952.

It is an arithmetic number, because the mean of its divisors is an integer number (26993888020).

Almost surely, 2^105521562217 is an apocalyptic number.

It is an amenable number.

105521562217 is a deficient number, since it is larger than the sum of its proper divisors (2453989863).

105521562217 is an equidigital number, since it uses as much as digits as its factorization.

105521562217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453989862.

The product of its (nonzero) digits is 42000, while the sum is 37.

Adding to 105521562217 its reverse (712265125501), we get a palindrome (817786687718).

The spelling of 105521562217 in words is "one hundred five billion, five hundred twenty-one million, five hundred sixty-two thousand, two hundred seventeen".