243351320548 has 96 divisors (see below), whose sum is σ = 505697955840. Its totient is φ = 100301604480.

The previous prime is 243351320539. The next prime is 243351320599. The reversal of 243351320548 is 845023153342.

It is a self number, because there is not a number n which added to its sum of digits gives 243351320548.

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, 91381065 + ... + 91383727.

It is an arithmetic number, because the mean of its divisors is an integer number (5267687040).

Almost surely, 2^243351320548 is an apocalyptic number.

243351320548 is a gapful number since it is divisible by the number (28) 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 243351320548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252848977920).

243351320548 is an abundant number, since it is smaller than the sum of its proper divisors (262346635292).

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

243351320548 is a wasteful number, since it uses less digits than its factorization.

243351320548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857 (or 3855 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 243351320548 in words is "two hundred forty-three billion, three hundred fifty-one million, three hundred twenty thousand, five hundred forty-eight".