13103257505 has 8 divisors (see below), whose sum is σ = 16933440552. Its totient is φ = 9676251648.

The previous prime is 13103257471. The next prime is 13103257507. The reversal of 13103257505 is 50575230131.

It can be written as a sum of positive squares in 4 ways, for example, as 462078016 + 12641179489 = 21496^2 + 112433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13103257505 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13103257507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100794224 + ... + 100794353.

It is an arithmetic number, because the mean of its divisors is an integer number (2116680069).

Almost surely, 2^13103257505 is an apocalyptic number.

It is an amenable number.

13103257505 is a deficient number, since it is larger than the sum of its proper divisors (3830183047).

13103257505 is a wasteful number, since it uses less digits than its factorization.

13103257505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201588595.

The product of its (nonzero) digits is 15750, while the sum is 32.

Adding to 13103257505 its reverse (50575230131), we get a palindrome (63678487636).

The spelling of 13103257505 in words is "thirteen billion, one hundred three million, two hundred fifty-seven thousand, five hundred five".