243320415240 has 192 divisors, whose sum is σ = 849968112960. Its totient is φ = 55561766400.

The previous prime is 243320415227. The next prime is 243320415241. The reversal of 243320415240 is 42514023342.

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

It is a junction number, because it is equal to n+sod(n) for n = 243320415198 and 243320415207.

It is not an unprimeable number, because it can be changed into a prime (243320415241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6160194 + ... + 6199566.

It is an arithmetic number, because the mean of its divisors is an integer number (4426917255).

Almost surely, 2^243320415240 is an apocalyptic number.

243320415240 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 243320415240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424984056480).

243320415240 is an abundant number, since it is smaller than the sum of its proper divisors (606647697720).

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

243320415240 is a wasteful number, since it uses less digits than its factorization.

243320415240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40452 (or 40441 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 243320415240 its reverse (42514023342), we get a palindrome (285834438582).

The spelling of 243320415240 in words is "two hundred forty-three billion, three hundred twenty million, four hundred fifteen thousand, two hundred forty".