13115575 has 24 divisors (see below), whose sum is σ = 18235440. Its totient is φ = 9273600.

The previous prime is 13115563. The next prime is 13115579. The reversal of 13115575 is 57551131.

It is not a de Polignac number, because 13115575 - 2¹³ = 13107383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13115579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9531 + ... + 10819.

It is an arithmetic number, because the mean of its divisors is an integer number (759810).

Almost surely, 2^13115575 is an apocalyptic number.

13115575 is a deficient number, since it is larger than the sum of its proper divisors (5119865).

13115575 is a wasteful number, since it uses less digits than its factorization.

13115575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1342 counting only the distinct ones).

The product of its digits is 2625, while the sum is 28.

The square root of 13115575 is about 3621.5431793643. The cubic root of 13115575 is about 235.8282229356.

Subtracting 13115575 from its reverse (57551131), we obtain a square (44435556 = 6666²).

It can be divided in two parts, 1311 and 5575, that added together give a palindrome (6886).

The spelling of 13115575 in words is "thirteen million, one hundred fifteen thousand, five hundred seventy-five".