13531155497 has 4 divisors (see below), whose sum is σ = 13967644416. Its totient is φ = 13094666580.

The previous prime is 13531155493. The next prime is 13531155499. The reversal of 13531155497 is 79455113531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13531155497 - 2² = 13531155493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13531155493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218244413 + ... + 218244474.

It is an arithmetic number, because the mean of its divisors is an integer number (3491911104).

Almost surely, 2^13531155497 is an apocalyptic number.

It is an amenable number.

13531155497 is a deficient number, since it is larger than the sum of its proper divisors (436488919).

13531155497 is an equidigital number, since it uses as much as digits as its factorization.

13531155497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436488918.

The product of its digits is 283500, while the sum is 44.

The spelling of 13531155497 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-five thousand, four hundred ninety-seven".