231403440000 has 320 divisors, whose sum is σ = 771026192640. Its totient is φ = 61471488000.

The previous prime is 231403439957. The next prime is 231403440011. The reversal of 231403440000 is 44304132.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 67918297 + ... + 67921703.

It is an arithmetic number, because the mean of its divisors is an integer number (2409456852).

Almost surely, 2^231403440000 is an apocalyptic number.

231403440000 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 231403440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385513096320).

231403440000 is an abundant number, since it is smaller than the sum of its proper divisors (539622752640).

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

231403440000 is an equidigital number, since it uses as much as digits as its factorization.

231403440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 231403440000 its reverse (44304132), we get a palindrome (231447744132).

The spelling of 231403440000 in words is "two hundred thirty-one billion, four hundred three million, four hundred forty thousand".