13509550 has 12 divisors (see below), whose sum is σ = 25127856. Its totient is φ = 5403800.

The previous prime is 13509527. The next prime is 13509557. The reversal of 13509550 is 5590531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13509557) 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 5 ways as a sum of consecutive naturals, for example, 135046 + ... + 135145.

It is an arithmetic number, because the mean of its divisors is an integer number (2093988).

Almost surely, 2^13509550 is an apocalyptic number.

13509550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13509550 is a deficient number, since it is larger than the sum of its proper divisors (11618306).

13509550 is a wasteful number, since it uses less digits than its factorization.

13509550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270203 (or 270198 counting only the distinct ones).

The product of its (nonzero) digits is 3375, while the sum is 28.

The square root of 13509550 is about 3675.5339748124. The cubic root of 13509550 is about 238.1662915240.

The spelling of 13509550 in words is "thirteen million, five hundred nine thousand, five hundred fifty".