13525511381 has 2 divisors, whose sum is σ = 13525511382. Its totient is φ = 13525511380.

The previous prime is 13525511371. The next prime is 13525511387. The reversal of 13525511381 is 18311552531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10438708900 + 3086802481 = 102170^2 + 55559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13525511381 is a prime.

It is a super-2 number, since 2×13525511381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13525511387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6762755690 + 6762755691.

It is an arithmetic number, because the mean of its divisors is an integer number (6762755691).

Almost surely, 2^13525511381 is an apocalyptic number.

It is an amenable number.

13525511381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13525511381 is an equidigital number, since it uses as much as digits as its factorization.

13525511381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 35.

The spelling of 13525511381 in words is "thirteen billion, five hundred twenty-five million, five hundred eleven thousand, three hundred eighty-one".