13154252131505 has 8 divisors (see below), whose sum is σ = 15785353108392. Its totient is φ = 10523234671488.

The previous prime is 13154252131379. The next prime is 13154252131541. The reversal of 13154252131505 is 50513125245131.

It can be written as a sum of positive squares in 4 ways, for example, as 1794359374369 + 11359892757136 = 1339537^2 + 3370444^2 .

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 13154252131505 - 2⁸ = 13154252131249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20532182 + ... + 21163151.

It is an arithmetic number, because the mean of its divisors is an integer number (1973169138549).

Almost surely, 2^{13154252131505} is an apocalyptic number.

It is an amenable number.

13154252131505 is a deficient number, since it is larger than the sum of its proper divisors (2631100976887).

13154252131505 is an equidigital number, since it uses as much as digits as its factorization.

13154252131505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41758435.

The product of its (nonzero) digits is 90000, while the sum is 38.

Adding to 13154252131505 its reverse (50513125245131), we get a palindrome (63667377376636).

The spelling of 13154252131505 in words is "thirteen trillion, one hundred fifty-four billion, two hundred fifty-two million, one hundred thirty-one thousand, five hundred five".