231247478784 has 512 divisors, whose sum is σ = 775095552000. Its totient is φ = 59793997824.

The previous prime is 231247478771. The next prime is 231247478789. The reversal of 231247478784 is 487874742132.

It is a tau number, because it is divible by the number of its divisors (512).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (231247478789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300711552 + ... + 300712320.

It is an arithmetic number, because the mean of its divisors is an integer number (1513858500).

Almost surely, 2^231247478784 is an apocalyptic number.

231247478784 is a gapful number since it is divisible by the number (24) 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 231247478784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387547776000).

231247478784 is an abundant number, since it is smaller than the sum of its proper divisors (543848073216).

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

231247478784 is an equidigital number, since it uses as much as digits as its factorization.

231247478784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 823 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 57.

The spelling of 231247478784 in words is "two hundred thirty-one billion, two hundred forty-seven million, four hundred seventy-eight thousand, seven hundred eighty-four".