13525235281 has 2 divisors, whose sum is σ = 13525235282. Its totient is φ = 13525235280.

The previous prime is 13525235257. The next prime is 13525235299. The reversal of 13525235281 is 18253252531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11171433025 + 2353802256 = 105695^2 + 48516^2 .

It is an emirp because it is prime and its reverse (18253252531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13525235281 - 2⁵ = 13525235249 is a prime.

It is a super-2 number, since 2×13525235281² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13525235281.

It is not a weakly prime, because it can be changed into another prime (13525235081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6762617640 + 6762617641.

It is an arithmetic number, because the mean of its divisors is an integer number (6762617641).

Almost surely, 2^13525235281 is an apocalyptic number.

It is an amenable number.

13525235281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13525235281 is an equidigital number, since it uses as much as digits as its factorization.

13525235281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 37.

The spelling of 13525235281 in words is "thirteen billion, five hundred twenty-five million, two hundred thirty-five thousand, two hundred eighty-one".