16813125 has 90 divisors (see below), whose sum is σ = 35880702. Its totient is φ = 7560000.

The previous prime is 16813123. The next prime is 16813151. The reversal of 16813125 is 52131861.

It can be written as a sum of positive squares in 5 ways, for example, as 11573604 + 5239521 = 3402^2 + 2289^2 .

It is not a de Polignac number, because 16813125 - 2¹ = 16813123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16813123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 275595 + ... + 275655.

Almost surely, 2^16813125 is an apocalyptic number.

16813125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16813125 is an abundant number, since it is smaller than the sum of its proper divisors (19067577).

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

16813125 is an equidigital number, since it uses as much as digits as its factorization.

16813125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 76 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 16813125 is about 4100.3810798510. The cubic root of 16813125 is about 256.1825124676.

Adding to 16813125 its reverse (52131861), we get a palindrome (68944986).

The spelling of 16813125 in words is "sixteen million, eight hundred thirteen thousand, one hundred twenty-five".