10505303 has 4 divisors (see below), whose sum is σ = 11123280. Its totient is φ = 9887328.

The previous prime is 10505291. The next prime is 10505317. The reversal of 10505303 is 30350501.

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 10505303 - 2¹⁰ = 10504279 is a prime.

It is a super-2 number, since 2×10505303² = 220722782243618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 617959 = 10505303 / (1 + 0 + 5 + 0 + 5 + 3 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505353) 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, 308963 + ... + 308996.

It is an arithmetic number, because the mean of its divisors is an integer number (2780820).

Almost surely, 2^10505303 is an apocalyptic number.

10505303 is a deficient number, since it is larger than the sum of its proper divisors (617977).

10505303 is an equidigital number, since it uses as much as digits as its factorization.

10505303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617976.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 10505303 is about 3241.1885165784. The cubic root of 10505303 is about 219.0128152186.

Adding to 10505303 its reverse (30350501), we get a palindrome (40855804).

The spelling of 10505303 in words is "ten million, five hundred five thousand, three hundred three".