13381538 has 16 divisors (see below), whose sum is σ = 21168000. Its totient is φ = 6331776.

The previous prime is 13381523. The next prime is 13381549. The reversal of 13381538 is 83518331.

13381538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2963 + ... + 5961.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^13381538 is an apocalyptic number.

13381538 is a deficient number, since it is larger than the sum of its proper divisors (7786462).

13381538 is a wasteful number, since it uses less digits than its factorization.

13381538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121.

The product of its digits is 8640, while the sum is 32.

The square root of 13381538 is about 3658.0784573325. The cubic root of 13381538 is about 237.4116413697.

Adding to 13381538 its reverse (83518331), we get a palindrome (96899869).

The spelling of 13381538 in words is "thirteen million, three hundred eighty-one thousand, five hundred thirty-eight".