132531221 has 8 divisors (see below), whose sum is σ = 138632064. Its totient is φ = 126458640.

The previous prime is 132531193. The next prime is 132531239. The reversal of 132531221 is 122135231.

132531221 is nontrivially palindromic in base 15.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 132531221 - 2¹⁸ = 132269077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 132531193 and 132531202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132533221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2840 + ... + 16526.

It is an arithmetic number, because the mean of its divisors is an integer number (17329008).

Almost surely, 2^132531221 is an apocalyptic number.

It is an amenable number.

132531221 is a deficient number, since it is larger than the sum of its proper divisors (6100843).

132531221 is a wasteful number, since it uses less digits than its factorization.

132531221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14131.

The product of its digits is 360, while the sum is 20.

The square root of 132531221 is about 11512.2205069222. The cubic root of 132531221 is about 509.8464499934.

Adding to 132531221 its reverse (122135231), we get a palindrome (254666452).

The spelling of 132531221 in words is "one hundred thirty-two million, five hundred thirty-one thousand, two hundred twenty-one".