16165000 has 80 divisors (see below), whose sum is σ = 39221820. Its totient is φ = 6240000.

The previous prime is 16164983. The next prime is 16165001. The reversal of 16165000 is 56161.

It can be written as a sum of positive squares in 10 ways, for example, as 3334276 + 12830724 = 1826^2 + 3582^2 .

It is a super-2 number, since 2×16165000² = 522614450000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16165001) 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 19 ways as a sum of consecutive naturals, for example, 264970 + ... + 265030.

Almost surely, 2^16165000 is an apocalyptic number.

16165000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16165000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19610910).

16165000 is an abundant number, since it is smaller than the sum of its proper divisors (23056820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16165000 is an equidigital number, since it uses as much as digits as its factorization.

16165000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 16165000 is about 4020.5720985949. The cubic root of 16165000 is about 252.8474450955.

The spelling of 16165000 in words is "sixteen million, one hundred sixty-five thousand".