815192065 has 16 divisors (see below), whose sum is σ = 1002247488. Its totient is φ = 636181056.

The previous prime is 815192051. The next prime is 815192069. The reversal of 815192065 is 560291518.

It is a cyclic number.

It is not a de Polignac number, because 815192065 - 2¹¹ = 815190017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815192069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212454 + ... + 216256.

It is an arithmetic number, because the mean of its divisors is an integer number (62640468).

Almost surely, 2^815192065 is an apocalyptic number.

It is an amenable number.

815192065 is a deficient number, since it is larger than the sum of its proper divisors (187055423).

815192065 is a wasteful number, since it uses less digits than its factorization.

815192065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4848.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 815192065 is about 28551.5685208361. The cubic root of 815192065 is about 934.1572338677.

The spelling of 815192065 in words is "eight hundred fifteen million, one hundred ninety-two thousand, sixty-five".