13381550 has 96 divisors (see below), whose sum is σ = 32622912. Its totient is φ = 3962880.

The previous prime is 13381549. The next prime is 13381597. The reversal of 13381550 is 5518331.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77264 + ... + 77436.

It is an arithmetic number, because the mean of its divisors is an integer number (339822).

Almost surely, 2^13381550 is an apocalyptic number.

13381550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13381550 is an abundant number, since it is smaller than the sum of its proper divisors (19241362).

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

13381550 is a wasteful number, since it uses less digits than its factorization.

13381550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 13381550 is about 3658.0800975375. The cubic root of 13381550 is about 237.4117123366.

Adding to 13381550 its reverse (5518331), we get a palindrome (18899881).

It can be divided in two parts, 13381 and 550, that added together give a palindrome (13931).

The spelling of 13381550 in words is "thirteen million, three hundred eighty-one thousand, five hundred fifty".