13320225 has 36 divisors (see below), whose sum is σ = 24329916. Its totient is φ = 6963840.

The previous prime is 13320221. The next prime is 13320233. The reversal of 13320225 is 52202331.

It can be written as a sum of positive squares in 6 ways, for example, as 1272384 + 12047841 = 1128^2 + 3471^2 .

It is not a de Polignac number, because 13320225 - 2² = 13320221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13320198 and 13320207.

It is not an unprimeable number, because it can be changed into a prime (13320221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11367 + ... + 12483.

It is an arithmetic number, because the mean of its divisors is an integer number (675831).

Almost surely, 2^13320225 is an apocalyptic number.

13320225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13320225 is a deficient number, since it is larger than the sum of its proper divisors (11009691).

13320225 is a wasteful number, since it uses less digits than its factorization.

13320225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 13320225 is about 3649.6883428589. The cubic root of 13320225 is about 237.0484865813.

Adding to 13320225 its reverse (52202331), we get a palindrome (65522556).

The spelling of 13320225 in words is "thirteen million, three hundred twenty thousand, two hundred twenty-five".