13500557 has 16 divisors (see below), whose sum is σ = 15899520. Its totient is φ = 11225088.

The previous prime is 13500551. The next prime is 13500589. The reversal of 13500557 is 75500531.

It is not a de Polignac number, because 13500557 - 2⁶ = 13500493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39893 + ... + 40229.

It is an arithmetic number, because the mean of its divisors is an integer number (993720).

Almost surely, 2^13500557 is an apocalyptic number.

It is an amenable number.

13500557 is a deficient number, since it is larger than the sum of its proper divisors (2398963).

13500557 is an equidigital number, since it uses as much as digits as its factorization.

13500557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 2625, while the sum is 26.

The square root of 13500557 is about 3674.3104114922. The cubic root of 13500557 is about 238.1134324998.

Subtracting from 13500557 its sum of digits (26), we obtain a palindrome (13500531).

The spelling of 13500557 in words is "thirteen million, five hundred thousand, five hundred fifty-seven".