243441305172 has 240 divisors, whose sum is σ = 698809964160. Its totient is φ = 73445315328.

The previous prime is 243441305171. The next prime is 243441305183. The reversal of 243441305172 is 271503144342.

243441305172 is a `hidden beast` number, since 2 + 4 + 3 + 4 + 4 + 130 + 517 + 2 = 666.

243441305172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243441305171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 64622833 + ... + 64626599.

It is an arithmetic number, because the mean of its divisors is an integer number (2911708184).

Almost surely, 2^243441305172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243441305172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349404982080).

243441305172 is an abundant number, since it is smaller than the sum of its proper divisors (455368658988).

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

243441305172 is a wasteful number, since it uses less digits than its factorization.

243441305172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092 (or 4081 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 243441305172 in words is "two hundred forty-three billion, four hundred forty-one million, three hundred five thousand, one hundred seventy-two".