231322433440 has 192 divisors, whose sum is σ = 640653995520. Its totient is φ = 77292195840.

The previous prime is 231322433431. The next prime is 231322433471. The reversal of 231322433440 is 44334223132.

It is a happy 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, 7431349 + ... + 7462411.

It is an arithmetic number, because the mean of its divisors is an integer number (3336739560).

Almost surely, 2^231322433440 is an apocalyptic number.

231322433440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231322433440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320326997760).

231322433440 is an abundant number, since it is smaller than the sum of its proper divisors (409331562080).

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

231322433440 is a wasteful number, since it uses less digits than its factorization.

231322433440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31255 (or 31247 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 231322433440 its reverse (44334223132), we get a palindrome (275656656572).

The spelling of 231322433440 in words is "two hundred thirty-one billion, three hundred twenty-two million, four hundred thirty-three thousand, four hundred forty".