10815965 has 4 divisors (see below), whose sum is σ = 12979164. Its totient is φ = 8652768.

The previous prime is 10815953. The next prime is 10815967. The reversal of 10815965 is 56951801.

10815965 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 7171684 + 3644281 = 2678^2 + 1909^2 .

It is a cyclic number.

It is not a de Polignac number, because 10815965 - 2⁶ = 10815901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10815967) 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, 1081592 + ... + 1081601.

It is an arithmetic number, because the mean of its divisors is an integer number (3244791).

Almost surely, 2^10815965 is an apocalyptic number.

It is an amenable number.

10815965 is a deficient number, since it is larger than the sum of its proper divisors (2163199).

10815965 is an equidigital number, since it uses as much as digits as its factorization.

10815965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163198.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 10815965 is about 3288.7634454305. The cubic root of 10815965 is about 221.1507540026.

The spelling of 10815965 in words is "ten million, eight hundred fifteen thousand, nine hundred sixty-five".