243031543320 has 128 divisors (see below), whose sum is σ = 761187248640. Its totient is φ = 61958645760.

The previous prime is 243031543277. The next prime is 243031543361. The reversal of 243031543320 is 23345130342.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5572800 + ... + 5616240.

It is an arithmetic number, because the mean of its divisors is an integer number (5946775380).

Almost surely, 2^243031543320 is an apocalyptic number.

243031543320 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 243031543320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380593624320).

243031543320 is an abundant number, since it is smaller than the sum of its proper divisors (518155705320).

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

243031543320 is a wasteful number, since it uses less digits than its factorization.

243031543320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45505 (or 45501 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 243031543320 its reverse (23345130342), we get a palindrome (266376673662).

The spelling of 243031543320 in words is "two hundred forty-three billion, thirty-one million, five hundred forty-three thousand, three hundred twenty".