16550000 has 60 divisors (see below), whose sum is σ = 40200552. Its totient is φ = 6600000.

The previous prime is 16549999. The next prime is 16550047. The reversal of 16550000 is 5561.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 49835 + ... + 50165.

Almost surely, 2^16550000 is an apocalyptic number.

16550000 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 16550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20100276).

16550000 is an abundant number, since it is smaller than the sum of its proper divisors (23650552).

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

16550000 is an frugal number, since it uses more digits than its factorization.

16550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 16550000 is about 4068.1691213616. The cubic root of 16550000 is about 254.8390628737.

Adding to 16550000 its reverse (5561), we get a palindrome (16555561).

The spelling of 16550000 in words is "sixteen million, five hundred fifty thousand".