231051440000 has 80 divisors (see below), whose sum is σ = 575188318320. Its totient is φ = 92420544000.

The previous prime is 231051439999. The next prime is 231051440003. The reversal of 231051440000 is 44150132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231051440003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1364072 + ... + 1524071.

It is an arithmetic number, because the mean of its divisors is an integer number (7189853979).

Almost surely, 2^231051440000 is an apocalyptic number.

231051440000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231051440000 is an abundant number, since it is smaller than the sum of its proper divisors (344136878320).

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

231051440000 is an frugal number, since it uses more digits than its factorization.

231051440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888177 (or 2888150 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 231051440000 its reverse (44150132), we get a palindrome (231095590132).

The spelling of 231051440000 in words is "two hundred thirty-one billion, fifty-one million, four hundred forty thousand".