132431221 has 4 divisors (see below), whose sum is σ = 142618252. Its totient is φ = 122244192.

The previous prime is 132431219. The next prime is 132431237. The reversal of 132431221 is 122134231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122134231 = 5113 ⋅23887.

It can be written as a sum of positive squares in 2 ways, for example, as 49420900 + 83010321 = 7030^2 + 9111^2 .

It is a cyclic number.

It is not a de Polignac number, because 132431221 - 2¹ = 132431219 is a prime.

It is a super-3 number, since 3×132431221³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132431261) 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, 5093496 + ... + 5093521.

It is an arithmetic number, because the mean of its divisors is an integer number (35654563).

Almost surely, 2^132431221 is an apocalyptic number.

It is an amenable number.

132431221 is a deficient number, since it is larger than the sum of its proper divisors (10187031).

132431221 is a wasteful number, since it uses less digits than its factorization.

132431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187030.

The product of its digits is 288, while the sum is 19.

The square root of 132431221 is about 11507.8764765703. The cubic root of 132431221 is about 509.7181846853.

Adding to 132431221 its reverse (122134231), we get a palindrome (254565452).

The spelling of 132431221 in words is "one hundred thirty-two million, four hundred thirty-one thousand, two hundred twenty-one".