231781998344 has 32 divisors (see below), whose sum is σ = 470083158720. Its totient is φ = 106505034816.

The previous prime is 231781998323. The next prime is 231781998361. The reversal of 231781998344 is 443899187132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4885364 + ... + 4932579.

It is an arithmetic number, because the mean of its divisors is an integer number (14690098710).

Almost surely, 2^231781998344 is an apocalyptic number.

It is an amenable number.

231781998344 is an abundant number, since it is smaller than the sum of its proper divisors (238301160376).

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

231781998344 is a wasteful number, since it uses less digits than its factorization.

231781998344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9818189 (or 9818185 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 59.

The spelling of 231781998344 in words is "two hundred thirty-one billion, seven hundred eighty-one million, nine hundred ninety-eight thousand, three hundred forty-four".