13500161 has 4 divisors (see below), whose sum is σ = 13508352. Its totient is φ = 13491972.

The previous prime is 13500133. The next prime is 13500163. The reversal of 13500161 is 16100531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13500161 - 2¹⁴ = 13483777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13500163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665 + ... + 5238.

It is an arithmetic number, because the mean of its divisors is an integer number (3377088).

Almost surely, 2^13500161 is an apocalyptic number.

It is an amenable number.

13500161 is a deficient number, since it is larger than the sum of its proper divisors (8191).

13500161 is an equidigital number, since it uses as much as digits as its factorization.

13500161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 13500161 is about 3674.2565234344. The cubic root of 13500161 is about 238.1111043528. Note that the first 4 decimals are identical.

Adding to 13500161 its reverse (16100531), we get a palindrome (29600692).

The spelling of 13500161 in words is "thirteen million, five hundred thousand, one hundred sixty-one".