13133216 has 12 divisors (see below), whose sum is σ = 25856082. Its totient is φ = 6566592.

The previous prime is 13133213. The next prime is 13133233. The reversal of 13133216 is 61233131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12988816 + 144400 = 3604^2 + 380^2 .

It is not an unprimeable number, because it can be changed into a prime (13133213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205175 + ... + 205238.

Almost surely, 2^13133216 is an apocalyptic number.

13133216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13133216 is a deficient number, since it is larger than the sum of its proper divisors (12722866).

13133216 is an equidigital number, since it uses as much as digits as its factorization.

13133216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410423 (or 410415 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 13133216 is about 3623.9779248776. The cubic root of 13133216 is about 235.9339085254.

Adding to 13133216 its reverse (61233131), we get a palindrome (74366347).

The spelling of 13133216 in words is "thirteen million, one hundred thirty-three thousand, two hundred sixteen".