13531155009 has 4 divisors (see below), whose sum is σ = 18041540016. Its totient is φ = 9020770004.

The previous prime is 13531154953. The next prime is 13531155013. The reversal of 13531155009 is 90055113531.

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 13531155009 - 2⁷ = 13531154881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13531155059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255192499 + ... + 2255192504.

It is an arithmetic number, because the mean of its divisors is an integer number (4510385004).

Almost surely, 2^13531155009 is an apocalyptic number.

It is an amenable number.

13531155009 is a deficient number, since it is larger than the sum of its proper divisors (4510385007).

13531155009 is an equidigital number, since it uses as much as digits as its factorization.

13531155009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510385006.

The product of its (nonzero) digits is 10125, while the sum is 33.

The spelling of 13531155009 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-five thousand, nine".