231243300520000 has 140 divisors (see below), whose sum is σ = 573616789242156. Its totient is φ = 92463677440000.

The previous prime is 231243300519983. The next prime is 231243300520003. The reversal of 231243300520000 is 25003342132.

It can be written as a sum of positive squares in 10 ways, for example, as 77714944409664 + 153528356110336 = 8815608^2 + 12390656^2 .

It is a super-3 number, since 3×231243300520000³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (231243300520003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109070040 + ... + 111169960.

Almost surely, 2^{231243300520000} is an apocalyptic number.

231243300520000 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 231243300520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286808394621078).

231243300520000 is an abundant number, since it is smaller than the sum of its proper divisors (342373488722156).

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

231243300520000 is an equidigital number, since it uses as much as digits as its factorization.

231243300520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102706 (or 2102681 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 231243300520000 its reverse (25003342132), we get a palindrome (231268303862132).

The spelling of 231243300520000 in words is "two hundred thirty-one trillion, two hundred forty-three billion, three hundred million, five hundred twenty thousand".