13331550 has 96 divisors (see below), whose sum is σ = 35426304. Its totient is φ = 3312000.

The previous prime is 13331533. The next prime is 13331557. The reversal of 13331550 is 5513331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218520 + ... + 218580.

It is an arithmetic number, because the mean of its divisors is an integer number (369024).

Almost surely, 2^13331550 is an apocalyptic number.

13331550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13331550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17713152).

13331550 is an abundant number, since it is smaller than the sum of its proper divisors (22094754).

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

13331550 is a wasteful number, since it uses less digits than its factorization.

13331550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 675, while the sum is 21.

The square root of 13331550 is about 3651.2395155618. The cubic root of 13331550 is about 237.1156479507.

Adding to 13331550 its reverse (5513331), we get a palindrome (18844881).

The spelling of 13331550 in words is "thirteen million, three hundred thirty-one thousand, five hundred fifty".