13531520099 has 2 divisors, whose sum is σ = 13531520100. Its totient is φ = 13531520098.

The previous prime is 13531520077. The next prime is 13531520131. The reversal of 13531520099 is 99002513531.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99002513531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531520099 is a prime.

It is not a weakly prime, because it can be changed into another prime (13531520399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765760049 + 6765760050.

It is an arithmetic number, because the mean of its divisors is an integer number (6765760050).

Almost surely, 2^13531520099 is an apocalyptic number.

13531520099 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531520099 is an equidigital number, since it uses as much as digits as its factorization.

13531520099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 38.

The spelling of 13531520099 in words is "thirteen billion, five hundred thirty-one million, five hundred twenty thousand, ninety-nine".