13315657 has 2 divisors, whose sum is σ = 13315658. Its totient is φ = 13315656.

The previous prime is 13315639. The next prime is 13315661. The reversal of 13315657 is 75651331.

13315657 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., 9709456 + 3606201 = 3116^2 + 1899^2 .

It is a cyclic number.

It is not a de Polignac number, because 13315657 - 2¹¹ = 13313609 is a prime.

It is not a weakly prime, because it can be changed into another prime (13315697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6657828 + 6657829.

It is an arithmetic number, because the mean of its divisors is an integer number (6657829).

Almost surely, 2^13315657 is an apocalyptic number.

It is an amenable number.

13315657 is a deficient number, since it is larger than the sum of its proper divisors (1).

13315657 is an equidigital number, since it uses as much as digits as its factorization.

13315657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 31.

The square root of 13315657 is about 3649.0624823371. The cubic root of 13315657 is about 237.0213859057.

Adding to 13315657 its reverse (75651331), we get a palindrome (88966988).

The spelling of 13315657 in words is "thirteen million, three hundred fifteen thousand, six hundred fifty-seven".