13125213515 has 4 divisors (see below), whose sum is σ = 15750256224. Its totient is φ = 10500170808.

The previous prime is 13125213499. The next prime is 13125213641. The reversal of 13125213515 is 51531252131.

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 13125213515 - 2⁴ = 13125213499 is a prime.

It is a Duffinian number.

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, 1312521347 + ... + 1312521356.

It is an arithmetic number, because the mean of its divisors is an integer number (3937564056).

Almost surely, 2^13125213515 is an apocalyptic number.

13125213515 is a deficient number, since it is larger than the sum of its proper divisors (2625042709).

13125213515 is an equidigital number, since it uses as much as digits as its factorization.

13125213515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625042708.

The product of its digits is 4500, while the sum is 29.

Adding to 13125213515 its reverse (51531252131), we get a palindrome (64656465646).

The spelling of 13125213515 in words is "thirteen billion, one hundred twenty-five million, two hundred thirteen thousand, five hundred fifteen".