243331021231 has 8 divisors (see below), whose sum is σ = 243915575904. Its totient is φ = 242746571520.

The previous prime is 243331021187. The next prime is 243331021243. The reversal of 243331021231 is 132120133342.

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 243331021231 - 2⁷ = 243331021103 is a prime.

It is a super-2 number, since 2×243331021231² (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 = 243331021196 and 243331021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243331061231) 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, 6600891 + ... + 6637651.

It is an arithmetic number, because the mean of its divisors is an integer number (30489446988).

Almost surely, 2^243331021231 is an apocalyptic number.

243331021231 is a deficient number, since it is larger than the sum of its proper divisors (584554673).

243331021231 is a wasteful number, since it uses less digits than its factorization.

243331021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52481.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 243331021231 its reverse (132120133342), we get a palindrome (375451154573).

The spelling of 243331021231 in words is "two hundred forty-three billion, three hundred thirty-one million, twenty-one thousand, two hundred thirty-one".