243132223331 has 4 divisors (see below), whose sum is σ = 243283332600. Its totient is φ = 242981114064.

The previous prime is 243132223291. The next prime is 243132223391. The reversal of 243132223331 is 133322231342.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243132223331 is a prime.

It is a super-2 number, since 2×243132223331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243132223294 and 243132223303.

It is not an unprimeable number, because it can be changed into a prime (243132223391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75552221 + ... + 75555438.

It is an arithmetic number, because the mean of its divisors is an integer number (60820833150).

Almost surely, 2^243132223331 is an apocalyptic number.

243132223331 is a deficient number, since it is larger than the sum of its proper divisors (151109269).

243132223331 is a wasteful number, since it uses less digits than its factorization.

243132223331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151109268.

The product of its digits is 15552, while the sum is 29.

Adding to 243132223331 its reverse (133322231342), we get a palindrome (376454454673).

The spelling of 243132223331 in words is "two hundred forty-three billion, one hundred thirty-two million, two hundred twenty-three thousand, three hundred thirty-one".