105516521 has 4 divisors (see below), whose sum is σ = 115108944. Its totient is φ = 95924100.

The previous prime is 105516497. The next prime is 105516527. The reversal of 105516521 is 125615501.

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.

It is a cyclic number.

It is not a de Polignac number, because 105516521 - 2¹⁰ = 105515497 is a prime.

It is a super-2 number, since 2×105516521² = 22267472407886882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105516527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4796195 + ... + 4796216.

It is an arithmetic number, because the mean of its divisors is an integer number (28777236).

Almost surely, 2^105516521 is an apocalyptic number.

105516521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

105516521 is a deficient number, since it is larger than the sum of its proper divisors (9592423).

105516521 is an equidigital number, since it uses as much as digits as its factorization.

105516521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592422.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 105516521 is about 10272.1234903013. The cubic root of 105516521 is about 472.5417165001.

It can be divided in two parts, 1055 and 16521, that added together give a cube (17576 = 26³).

The spelling of 105516521 in words is "one hundred five million, five hundred sixteen thousand, five hundred twenty-one".