105507243 has 18 divisors (see below), whose sum is σ = 154289772. Its totient is φ = 69470280.

The previous prime is 105507223. The next prime is 105507263. The reversal of 105507243 is 342705501.

It is a happy number.

105507243 is a `hidden beast` number, since 1 + 0 + 550 + 72 + 43 = 666.

It is an interprime number because it is at equal distance from previous prime (105507223) and next prime (105507263).

It is not a de Polignac number, because 105507243 - 2⁶ = 105507179 is a prime.

It is a super-2 number, since 2×105507243² = 22263556650922098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105507223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 318588 + ... + 318918.

It is an arithmetic number, because the mean of its divisors is an integer number (8571654).

Almost surely, 2^105507243 is an apocalyptic number.

105507243 is a deficient number, since it is larger than the sum of its proper divisors (48782529).

105507243 is an equidigital number, since it uses as much as digits as its factorization.

105507243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 105507243 is about 10271.6718697591. The cubic root of 105507243 is about 472.5278659974.

The spelling of 105507243 in words is "one hundred five million, five hundred seven thousand, two hundred forty-three".