243421651231 has 8 divisors (see below), whose sum is σ = 269291046528. Its totient is φ = 218175615000.

The previous prime is 243421651229. The next prime is 243421651273. The reversal of 243421651231 is 132156124342.

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 243421651231 - 2¹ = 243421651229 is a prime.

It is a super-2 number, since 2×243421651231² (a number of 24 digits) contains 22 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 (243421651201) 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, 155838945 + ... + 155840506.

It is an arithmetic number, because the mean of its divisors is an integer number (33661380816).

Almost surely, 2^243421651231 is an apocalyptic number.

243421651231 is a deficient number, since it is larger than the sum of its proper divisors (25869395297).

243421651231 is a wasteful number, since it uses less digits than its factorization.

243421651231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311679533.

The product of its digits is 34560, while the sum is 34.

Adding to 243421651231 its reverse (132156124342), we get a palindrome (375577775573).

The spelling of 243421651231 in words is "two hundred forty-three billion, four hundred twenty-one million, six hundred fifty-one thousand, two hundred thirty-one".