16085815 has 12 divisors (see below), whose sum is σ = 19580184. Its totient is φ = 12686384.

The previous prime is 16085803. The next prime is 16085833. The reversal of 16085815 is 51858061.

It is a de Polignac number, because none of the positive numbers 2^k-16085815 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34212 + ... + 34678.

It is an arithmetic number, because the mean of its divisors is an integer number (1631682).

Almost surely, 2^16085815 is an apocalyptic number.

16085815 is a deficient number, since it is larger than the sum of its proper divisors (3494369).

16085815 is an frugal number, since it uses more digits than its factorization.

16085815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 16085815 is about 4010.7125302121. The cubic root of 16085815 is about 252.4339074802.

It can be divided in two parts, 16085 and 815, that added together give a square (16900 = 130²).

The spelling of 16085815 in words is "sixteen million, eighty-five thousand, eight hundred fifteen".