16553137 has 4 divisors (see below), whose sum is σ = 16565796. Its totient is φ = 16540480.

The previous prime is 16553129. The next prime is 16553149. The reversal of 16553137 is 73135561.

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 11128896 + 5424241 = 3336^2 + 2329^2 .

It is a cyclic number.

It is not a de Polignac number, because 16553137 - 2³ = 16553129 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16553099 and 16553108.

It is not an unprimeable number, because it can be changed into a prime (16553197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4108 + ... + 7069.

It is an arithmetic number, because the mean of its divisors is an integer number (4141449).

Almost surely, 2^16553137 is an apocalyptic number.

It is an amenable number.

16553137 is a deficient number, since it is larger than the sum of its proper divisors (12659).

16553137 is a wasteful number, since it uses less digits than its factorization.

16553137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12658.

The product of its digits is 9450, while the sum is 31.

The square root of 16553137 is about 4068.5546573691. The cubic root of 16553137 is about 254.8551631685.

Adding to 16553137 its reverse (73135561), we get a palindrome (89688698).

The spelling of 16553137 in words is "sixteen million, five hundred fifty-three thousand, one hundred thirty-seven".