243130112440 has 128 divisors (see below), whose sum is σ = 602411385600. Its totient is φ = 87929487360.

The previous prime is 243130112363. The next prime is 243130112447. The reversal of 243130112440 is 44211031342.

It is a super-2 number, since 2×243130112440² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243130112447) 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, 1926480 + ... + 2048800.

It is an arithmetic number, because the mean of its divisors is an integer number (4706338950).

Almost surely, 2^243130112440 is an apocalyptic number.

243130112440 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 243130112440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301205692800).

243130112440 is an abundant number, since it is smaller than the sum of its proper divisors (359281273160).

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

243130112440 is a wasteful number, since it uses less digits than its factorization.

243130112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122465 (or 122461 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 243130112440 its reverse (44211031342), we get a palindrome (287341143782).

The spelling of 243130112440 in words is "two hundred forty-three billion, one hundred thirty million, one hundred twelve thousand, four hundred forty".