13221825 has 24 divisors (see below), whose sum is σ = 22617600. Its totient is φ = 6807360.

The previous prime is 13221823. The next prime is 13221827. The reversal of 13221825 is 52812231.

It is an interprime number because it is at equal distance from previous prime (13221823) and next prime (13221827).

It is not a de Polignac number, because 13221825 - 2¹ = 13221823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13221795 and 13221804.

It is not an unprimeable number, because it can be changed into a prime (13221821) 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, 865 + ... + 5214.

It is an arithmetic number, because the mean of its divisors is an integer number (942400).

Almost surely, 2^13221825 is an apocalyptic number.

13221825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13221825 is a deficient number, since it is larger than the sum of its proper divisors (9395775).

13221825 is a wasteful number, since it uses less digits than its factorization.

13221825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121 (or 6116 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 13221825 is about 3636.1827511829. The cubic root of 13221825 is about 236.4633301658.

The spelling of 13221825 in words is "thirteen million, two hundred twenty-one thousand, eight hundred twenty-five".