163501 has 4 divisors (see below), whose sum is σ = 176092. Its totient is φ = 150912.

The previous prime is 163487. The next prime is 163517. The reversal of 163501 is 105361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90601 + 72900 = 301^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 163501 - 2⁵ = 163469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163561) 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, 6276 + ... + 6301.

It is an arithmetic number, because the mean of its divisors is an integer number (44023).

2¹⁶³⁵⁰¹ is an apocalyptic number.

It is an amenable number.

163501 is a deficient number, since it is larger than the sum of its proper divisors (12591).

163501 is a wasteful number, since it uses less digits than its factorization.

163501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12590.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 163501 is about 404.3525689296. The cubic root of 163501 is about 54.6814645312.

Adding to 163501 its reverse (105361), we get a palindrome (268862).

The spelling of 163501 in words is "one hundred sixty-three thousand, five hundred one".