13215533 has 2 divisors, whose sum is σ = 13215534. Its totient is φ = 13215532.

The previous prime is 13215479. The next prime is 13215539. The reversal of 13215533 is 33551231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12802084 + 413449 = 3578^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215533 - 2⁸ = 13215277 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13215499 and 13215508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13215539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607766 + 6607767.

It is an arithmetic number, because the mean of its divisors is an integer number (6607767).

Almost surely, 2^13215533 is an apocalyptic number.

It is an amenable number.

13215533 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215533 is an equidigital number, since it uses as much as digits as its factorization.

13215533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 23.

The square root of 13215533 is about 3635.3174551887. The cubic root of 13215533 is about 236.4258148368.

Adding to 13215533 its reverse (33551231), we get a palindrome (46766764).

The spelling of 13215533 in words is "thirteen million, two hundred fifteen thousand, five hundred thirty-three".