16725553 has 4 divisors (see below), whose sum is σ = 18012148. Its totient is φ = 15438960.

The previous prime is 16725539. The next prime is 16725557. The reversal of 16725553 is 35552761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11235904 + 5489649 = 3352^2 + 2343^2 .

It is a cyclic number.

It is not a de Polignac number, because 16725553 - 2¹⁷ = 16594481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16725557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643278 + ... + 643303.

It is an arithmetic number, because the mean of its divisors is an integer number (4503037).

Almost surely, 2^16725553 is an apocalyptic number.

16725553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16725553 is a deficient number, since it is larger than the sum of its proper divisors (1286595).

16725553 is a wasteful number, since it uses less digits than its factorization.

16725553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286594.

The product of its digits is 31500, while the sum is 34.

The square root of 16725553 is about 4089.6886189538. The cubic root of 16725553 is about 255.7369582088.

It can be divided in two parts, 1672 and 5553, that added together give a square (7225 = 85²).

The spelling of 16725553 in words is "sixteen million, seven hundred twenty-five thousand, five hundred fifty-three".