13381225 has 48 divisors (see below), whose sum is σ = 20623680. Its totient is φ = 8467200.

The previous prime is 13381217. The next prime is 13381231. The reversal of 13381225 is 52218331.

13381225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13381225 - 2³ = 13381217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 13381225.

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, 67827 + ... + 68023.

It is an arithmetic number, because the mean of its divisors is an integer number (429660).

Almost surely, 2^13381225 is an apocalyptic number.

It is an amenable number.

13381225 is a deficient number, since it is larger than the sum of its proper divisors (7242455).

13381225 is a wasteful number, since it uses less digits than its factorization.

13381225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 245 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 13381225 is about 3658.0356750584. The cubic root of 13381225 is about 237.4097903014.

Adding to 13381225 its reverse (52218331), we get a palindrome (65599556).

The spelling of 13381225 in words is "thirteen million, three hundred eighty-one thousand, two hundred twenty-five".