16755521 has 2 divisors, whose sum is σ = 16755522. Its totient is φ = 16755520.

The previous prime is 16755463. The next prime is 16755539. The reversal of 16755521 is 12555761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13424896 + 3330625 = 3664^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 16755521 - 2¹⁸ = 16493377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16755121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8377760 + 8377761.

It is an arithmetic number, because the mean of its divisors is an integer number (8377761).

Almost surely, 2^16755521 is an apocalyptic number.

It is an amenable number.

16755521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16755521 is an equidigital number, since it uses as much as digits as its factorization.

16755521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 32.

The square root of 16755521 is about 4093.3508278671. The cubic root of 16755521 is about 255.8896059257.

The spelling of 16755521 in words is "sixteen million, seven hundred fifty-five thousand, five hundred twenty-one".