106520305 has 4 divisors (see below), whose sum is σ = 127824372. Its totient is φ = 85216240.

The previous prime is 106520303. The next prime is 106520321. The reversal of 106520305 is 503025601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503025601 = 13 ⋅38694277.

It can be written as a sum of positive squares in 2 ways, for example, as 13667809 + 92852496 = 3697^2 + 9636^2 .

It is not a de Polignac number, because 106520305 - 2¹ = 106520303 is a prime.

It is a super-2 number, since 2×106520305² = 22693150754586050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106520303) 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, 10652026 + ... + 10652035.

It is an arithmetic number, because the mean of its divisors is an integer number (31956093).

Almost surely, 2^106520305 is an apocalyptic number.

It is an amenable number.

106520305 is a deficient number, since it is larger than the sum of its proper divisors (21304067).

106520305 is an equidigital number, since it uses as much as digits as its factorization.

106520305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21304066.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 106520305 is about 10320.8674538529. The cubic root of 106520305 is about 474.0354276309.

Adding to 106520305 its reverse (503025601), we get a palindrome (609545906).

The spelling of 106520305 in words is "one hundred six million, five hundred twenty thousand, three hundred five".