243432131221 has 8 divisors (see below), whose sum is σ = 245857046400. Its totient is φ = 241007504400.

The previous prime is 243432131219. The next prime is 243432131231. The reversal of 243432131221 is 122131234342.

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 243432131221 - 2¹ = 243432131219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243432131221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243432131231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888840 + ... + 2013598.

It is an arithmetic number, because the mean of its divisors is an integer number (30732130800).

Almost surely, 2^243432131221 is an apocalyptic number.

It is an amenable number.

243432131221 is a deficient number, since it is larger than the sum of its proper divisors (2424915179).

243432131221 is a wasteful number, since it uses less digits than its factorization.

243432131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144179.

The product of its digits is 6912, while the sum is 28.

Adding to 243432131221 its reverse (122131234342), we get a palindrome (365563365563).

The spelling of 243432131221 in words is "two hundred forty-three billion, four hundred thirty-two million, one hundred thirty-one thousand, two hundred twenty-one".