13215631025 has 6 divisors (see below), whose sum is σ = 16387382502. Its totient is φ = 10572504800.

The previous prime is 13215631001. The next prime is 13215631061. The reversal of 13215631025 is 52013651231.

13215631025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 36820624 + 13178810401 = 6068^2 + 114799^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13215631025 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264312596 + ... + 264312645.

It is an arithmetic number, because the mean of its divisors is an integer number (2731230417).

Almost surely, 2^13215631025 is an apocalyptic number.

It is an amenable number.

13215631025 is a deficient number, since it is larger than the sum of its proper divisors (3171751477).

13215631025 is an equidigital number, since it uses as much as digits as its factorization.

13215631025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528625251 (or 528625246 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 13215631025 in words is "thirteen billion, two hundred fifteen million, six hundred thirty-one thousand, twenty-five".