10815505 has 4 divisors (see below), whose sum is σ = 12978612. Its totient is φ = 8652400.

The previous prime is 10815487. The next prime is 10815517. The reversal of 10815505 is 50551801.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6843456 + 3972049 = 2616^2 + 1993^2 .

It is not a de Polignac number, because 10815505 - 2⁵ = 10815473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10815505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081546 + ... + 1081555.

It is an arithmetic number, because the mean of its divisors is an integer number (3244653).

Almost surely, 2^10815505 is an apocalyptic number.

It is an amenable number.

10815505 is a deficient number, since it is larger than the sum of its proper divisors (2163107).

10815505 is an equidigital number, since it uses as much as digits as its factorization.

10815505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163106.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 10815505 is about 3288.6935095871. The cubic root of 10815505 is about 221.1476187980.

The spelling of 10815505 in words is "ten million, eight hundred fifteen thousand, five hundred five".