231025333440000 has 400 divisors, whose sum is σ = 839003190537600. Its totient is φ = 56006138880000.

The previous prime is 231025333439983. The next prime is 231025333440061. The reversal of 231025333440000 is 44333520132.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 231025333440000.

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, 378700 + ... + 21498699.

It is an arithmetic number, because the mean of its divisors is an integer number (2097507976344).

Almost surely, 2^{231025333440000} is an apocalyptic number.

231025333440000 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 231025333440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419501595268800).

231025333440000 is an abundant number, since it is smaller than the sum of its proper divisors (607977857097600).

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

231025333440000 is an equidigital number, since it uses as much as digits as its factorization.

231025333440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21877451 (or 21877420 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 231025333440000 its reverse (44333520132), we get a palindrome (231069666960132).

The spelling of 231025333440000 in words is "two hundred thirty-one trillion, twenty-five billion, three hundred thirty-three million, four hundred forty thousand".