13131515033545 has 4 divisors (see below), whose sum is σ = 15757818040260. Its totient is φ = 10505212026832.

The previous prime is 13131515033537. The next prime is 13131515033551. The reversal of 13131515033545 is 54533051513131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4641564316041 + 8489950717504 = 2154429^2 + 2913752^2 .

It is a cyclic number.

It is not a de Polignac number, because 13131515033545 - 2³ = 13131515033537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13131515033498 and 13131515033507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313151503350 + ... + 1313151503359.

It is an arithmetic number, because the mean of its divisors is an integer number (3939454510065).

Almost surely, 2^{13131515033545} is an apocalyptic number.

It is an amenable number.

13131515033545 is a deficient number, since it is larger than the sum of its proper divisors (2626303006715).

13131515033545 is an equidigital number, since it uses as much as digits as its factorization.

13131515033545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626303006714.

The product of its (nonzero) digits is 202500, while the sum is 40.

Adding to 13131515033545 its reverse (54533051513131), we get a palindrome (67664566546676).

The spelling of 13131515033545 in words is "thirteen trillion, one hundred thirty-one billion, five hundred fifteen million, thirty-three thousand, five hundred forty-five".