13215277 has 2 divisors, whose sum is σ = 13215278. Its totient is φ = 13215276.

The previous prime is 13215247. The next prime is 13215287. The reversal of 13215277 is 77251231.

13215277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12187081 + 1028196 = 3491^2 + 1014^2 .

It is an emirp because it is prime and its reverse (77251231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13215277 - 2¹¹ = 13213229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13215247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607638 + 6607639.

It is an arithmetic number, because the mean of its divisors is an integer number (6607639).

Almost surely, 2^13215277 is an apocalyptic number.

It is an amenable number.

13215277 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215277 is an equidigital number, since it uses as much as digits as its factorization.

13215277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 28.

The square root of 13215277 is about 3635.2822448883. The cubic root of 13215277 is about 236.4242882141.

The spelling of 13215277 in words is "thirteen million, two hundred fifteen thousand, two hundred seventy-seven".