13215412625 has 8 divisors (see below), whose sum is σ = 16492835112. Its totient is φ = 10572330000.

The previous prime is 13215412601. The next prime is 13215412663. The reversal of 13215412625 is 52621451231.

It can be written as a sum of positive squares in 4 ways, for example, as 3519376 + 13211893249 = 1876^2 + 114943^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13215412625 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13215412591 and 13215412600.

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, 52861526 + ... + 52861775.

It is an arithmetic number, because the mean of its divisors is an integer number (2061604389).

Almost surely, 2^13215412625 is an apocalyptic number.

It is an amenable number.

13215412625 is a deficient number, since it is larger than the sum of its proper divisors (3277422487).

13215412625 is an equidigital number, since it uses as much as digits as its factorization.

13215412625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105723316 (or 105723306 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

Adding to 13215412625 its reverse (52621451231), we get a palindrome (65836863856).

The spelling of 13215412625 in words is "thirteen billion, two hundred fifteen million, four hundred twelve thousand, six hundred twenty-five".