13321550 has 48 divisors (see below), whose sum is σ = 27600912. Its totient is φ = 4742400.

The previous prime is 13321513. The next prime is 13321559. The reversal of 13321550 is 5512331.

13321550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28922 + ... + 29378.

It is an arithmetic number, because the mean of its divisors is an integer number (575019).

Almost surely, 2^13321550 is an apocalyptic number.

13321550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13321550 is an abundant number, since it is smaller than the sum of its proper divisors (14279362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13321550 is a wasteful number, since it uses less digits than its factorization.

13321550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13321550 is about 3649.8698606937. The cubic root of 13321550 is about 237.0563462792.

Adding to 13321550 its reverse (5512331), we get a palindrome (18833881).

It can be divided in two parts, 1332 and 1550, that added together give a palindrome (2882).

The spelling of 13321550 in words is "thirteen million, three hundred twenty-one thousand, five hundred fifty".