13550506 has 4 divisors (see below), whose sum is σ = 20325762. Its totient is φ = 6775252.

The previous prime is 13550501. The next prime is 13550521. The reversal of 13550506 is 60505531.

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

It can be written as a sum of positive squares in only one way, i.e., 13024881 + 525625 = 3609^2 + 725^2 .

It is not an unprimeable number, because it can be changed into a prime (13550501) 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 as a sum of consecutive naturals, namely, 3387625 + ... + 3387628.

Almost surely, 2^13550506 is an apocalyptic number.

13550506 is a deficient number, since it is larger than the sum of its proper divisors (6775256).

13550506 is an equidigital number, since it uses as much as digits as its factorization.

13550506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775255.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 13550506 is about 3681.1011939364. The cubic root of 13550506 is about 238.4067263278.

The spelling of 13550506 in words is "thirteen million, five hundred fifty thousand, five hundred six".