105344343521 has 4 divisors (see below), whose sum is σ = 105363306132. Its totient is φ = 105325380912.

The previous prime is 105344343491. The next prime is 105344343563. The reversal of 105344343521 is 125343443501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75920087296 + 29424256225 = 275536^2 + 171535^2 .

It is a cyclic number.

It is not a de Polignac number, because 105344343521 - 2¹⁰ = 105344342497 is a prime.

It is a super-2 number, since 2×105344343521² (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 (105344343571) 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, 9472970 + ... + 9484083.

It is an arithmetic number, because the mean of its divisors is an integer number (26340826533).

Almost surely, 2^105344343521 is an apocalyptic number.

It is an amenable number.

105344343521 is a deficient number, since it is larger than the sum of its proper divisors (18962611).

105344343521 is an equidigital number, since it uses as much as digits as its factorization.

105344343521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18962610.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 105344343521 in words is "one hundred five billion, three hundred forty-four million, three hundred forty-three thousand, five hundred twenty-one".