10505543 has 4 divisors (see below), whose sum is σ = 10576200. Its totient is φ = 10434888.

The previous prime is 10505531. The next prime is 10505563. The reversal of 10505543 is 34550501.

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

It is a cyclic number.

It is not a de Polignac number, because 10505543 - 2⁴ = 10505527 is a prime.

It is a super-2 number, since 2×10505543² = 220732867449698, 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 (10505563) 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, 35105 + ... + 35402.

It is an arithmetic number, because the mean of its divisors is an integer number (2644050).

Almost surely, 2^10505543 is an apocalyptic number.

10505543 is a deficient number, since it is larger than the sum of its proper divisors (70657).

10505543 is an equidigital number, since it uses as much as digits as its factorization.

10505543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70656.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 10505543 is about 3241.2255398229. The cubic root of 10505543 is about 219.0144830326.

The spelling of 10505543 in words is "ten million, five hundred five thousand, five hundred forty-three".