13502225257 has 2 divisors, whose sum is σ = 13502225258. Its totient is φ = 13502225256.

The previous prime is 13502225239. The next prime is 13502225263. The reversal of 13502225257 is 75252220531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12820806441 + 681418816 = 113229^2 + 26104^2 .

It is an emirp because it is prime and its reverse (75252220531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13502225257 is a prime.

It is not a weakly prime, because it can be changed into another prime (13502225287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6751112628 + 6751112629.

It is an arithmetic number, because the mean of its divisors is an integer number (6751112629).

Almost surely, 2^13502225257 is an apocalyptic number.

It is an amenable number.

13502225257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13502225257 is an equidigital number, since it uses as much as digits as its factorization.

13502225257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 34.

Adding to 13502225257 its reverse (75252220531), we get a palindrome (88754445788).

The spelling of 13502225257 in words is "thirteen billion, five hundred two million, two hundred twenty-five thousand, two hundred fifty-seven".