231855421738368 has 256 divisors, whose sum is σ = 665303818544640. Its totient is φ = 71274441768960.

The previous prime is 231855421738313. The next prime is 231855421738459. The reversal of 231855421738368 is 863837124558132.

It is a junction number, because it is equal to n+sod(n) for n = 231855421738299 and 231855421738308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103621771 + ... + 105835637.

It is an arithmetic number, because the mean of its divisors is an integer number (2598843041190).

Almost surely, 2^{231855421738368} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231855421738368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332651909272320).

231855421738368 is an abundant number, since it is smaller than the sum of its proper divisors (433448396806272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231855421738368 is a wasteful number, since it uses less digits than its factorization.

231855421738368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214225 (or 2214213 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 66.

The spelling of 231855421738368 in words is "two hundred thirty-one trillion, eight hundred fifty-five billion, four hundred twenty-one million, seven hundred thirty-eight thousand, three hundred sixty-eight".