13115501131 has 4 divisors (see below), whose sum is σ = 13116054600. Its totient is φ = 13114947664.

The previous prime is 13115501083. The next prime is 13115501167. The reversal of 13115501131 is 13110551131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13115501131 - 2¹⁹ = 13114976843 is a prime.

It is a super-2 number, since 2×13115501131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13115511131) 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 in 3 ways as a sum of consecutive naturals, for example, 239521 + ... + 289138.

It is an arithmetic number, because the mean of its divisors is an integer number (3279013650).

Almost surely, 2^13115501131 is an apocalyptic number.

13115501131 is a deficient number, since it is larger than the sum of its proper divisors (553469).

13115501131 is an equidigital number, since it uses as much as digits as its factorization.

13115501131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553468.

The product of its (nonzero) digits is 225, while the sum is 22.

The spelling of 13115501131 in words is "thirteen billion, one hundred fifteen million, five hundred one thousand, one hundred thirty-one".