13515344225 has 6 divisors (see below), whose sum is σ = 16759026870. Its totient is φ = 10812275360.

The previous prime is 13515344153. The next prime is 13515344239. The reversal of 13515344225 is 52244351531.

It can be written as a sum of positive squares in 3 ways, for example, as 343879936 + 13171464289 = 18544^2 + 114767^2 .

It is not a de Polignac number, because 13515344225 - 2¹⁴ = 13515327841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 270306860 + ... + 270306909.

It is an arithmetic number, because the mean of its divisors is an integer number (2793171145).

Almost surely, 2^13515344225 is an apocalyptic number.

It is an amenable number.

13515344225 is a deficient number, since it is larger than the sum of its proper divisors (3243682645).

13515344225 is an equidigital number, since it uses as much as digits as its factorization.

13515344225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540613779 (or 540613774 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

Adding to 13515344225 its reverse (52244351531), we get a palindrome (65759695756).

The spelling of 13515344225 in words is "thirteen billion, five hundred fifteen million, three hundred forty-four thousand, two hundred twenty-five".