13161531305 has 8 divisors (see below), whose sum is σ = 17008748232. Its totient is φ = 9719284608.

The previous prime is 13161531301. The next prime is 13161531353. The reversal of 13161531305 is 50313516131.

It can be written as a sum of positive squares in 4 ways, for example, as 63186601 + 13098344704 = 7949^2 + 114448^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13161531305 - 2² = 13161531301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13161531301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101242484 + ... + 101242613.

It is an arithmetic number, because the mean of its divisors is an integer number (2126093529).

Almost surely, 2^13161531305 is an apocalyptic number.

It is an amenable number.

13161531305 is a deficient number, since it is larger than the sum of its proper divisors (3847216927).

13161531305 is a wasteful number, since it uses less digits than its factorization.

13161531305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202485115.

The product of its (nonzero) digits is 4050, while the sum is 29.

The spelling of 13161531305 in words is "thirteen billion, one hundred sixty-one million, five hundred thirty-one thousand, three hundred five".