16315665 has 32 divisors (see below), whose sum is σ = 27941760. Its totient is φ = 8100864.

The previous prime is 16315643. The next prime is 16315667. The reversal of 16315665 is 56651361.

It is not a de Polignac number, because 16315665 - 2⁶ = 16315601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16315667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27502 + ... + 28088.

It is an arithmetic number, because the mean of its divisors is an integer number (873180).

Almost surely, 2^16315665 is an apocalyptic number.

16315665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16315665 is a deficient number, since it is larger than the sum of its proper divisors (11626095).

16315665 is a wasteful number, since it uses less digits than its factorization.

16315665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721.

The product of its digits is 16200, while the sum is 33.

The square root of 16315665 is about 4039.2654035109. The cubic root of 16315665 is about 253.6305673647.

The spelling of 16315665 in words is "sixteen million, three hundred fifteen thousand, six hundred sixty-five".