13550215 has 16 divisors (see below), whose sum is σ = 18964800. Its totient is φ = 9290400.

The previous prime is 13550183. The next prime is 13550219. The reversal of 13550215 is 51205531.

13550215 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13550215 - 2⁵ = 13550183 is a prime.

13550215 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13550219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2236 + ... + 5665.

It is an arithmetic number, because the mean of its divisors is an integer number (1185300).

Almost surely, 2^13550215 is an apocalyptic number.

13550215 is a deficient number, since it is larger than the sum of its proper divisors (5414585).

13550215 is an frugal number, since it uses more digits than its factorization.

13550215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7927 (or 7913 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 13550215 is about 3681.0616675084. The cubic root of 13550215 is about 238.4050197038.

Adding to 13550215 its reverse (51205531), we get a palindrome (64755746).

The spelling of 13550215 in words is "thirteen million, five hundred fifty thousand, two hundred fifteen".