105530309 has 4 divisors (see below), whose sum is σ = 105580416. Its totient is φ = 105480204.

The previous prime is 105530263. The next prime is 105530311. The reversal of 105530309 is 903035501.

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: 903035501 = 251 ⋅3597751.

It is a cyclic number.

It is not a de Polignac number, because 105530309 - 2⁸ = 105530053 is a prime.

It is a super-2 number, since 2×105530309² = 22273292235270962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105530209) 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, 21749 + ... + 26154.

It is an arithmetic number, because the mean of its divisors is an integer number (26395104).

Almost surely, 2^105530309 is an apocalyptic number.

It is an amenable number.

105530309 is a deficient number, since it is larger than the sum of its proper divisors (50107).

105530309 is an equidigital number, since it uses as much as digits as its factorization.

105530309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50106.

The product of its (nonzero) digits is 2025, while the sum is 26.

The square root of 105530309 is about 10272.7946051695. The cubic root of 105530309 is about 472.5622981788.

The spelling of 105530309 in words is "one hundred five million, five hundred thirty thousand, three hundred nine".