13500550 has 48 divisors (see below), whose sum is σ = 30399840. Its totient is φ = 4354560.

The previous prime is 13500493. The next prime is 13500551. The reversal of 13500550 is 5500531.

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 23 ways as a sum of consecutive naturals, for example, 4816 + ... + 7084.

It is an arithmetic number, because the mean of its divisors is an integer number (633330).

Almost surely, 2^13500550 is an apocalyptic number.

13500550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13500550 is an abundant number, since it is smaller than the sum of its proper divisors (16899290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13500550 is a wasteful number, since it uses less digits than its factorization.

13500550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 13500550 is about 3674.3094589324. The cubic root of 13500550 is about 238.1133913461.

Subtracting from 13500550 its sum of digits (19), we obtain a palindrome (13500531).

The spelling of 13500550 in words is "thirteen million, five hundred thousand, five hundred fifty".