243051221448 has 192 divisors, whose sum is σ = 769144896000. Its totient is φ = 67891654656.

The previous prime is 243051221389. The next prime is 243051221449. The reversal of 243051221448 is 844122150342.

243051221448 is a `hidden beast` number, since 2 + 430 + 5 + 1 + 2 + 214 + 4 + 8 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (243051221449) 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, 23896108 + ... + 23906276.

It is an arithmetic number, because the mean of its divisors is an integer number (4005963000).

Almost surely, 2^243051221448 is an apocalyptic number.

243051221448 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 243051221448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384572448000).

243051221448 is an abundant number, since it is smaller than the sum of its proper divisors (526093674552).

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

243051221448 is a wasteful number, since it uses less digits than its factorization.

243051221448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11244 (or 11237 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The spelling of 243051221448 in words is "two hundred forty-three billion, fifty-one million, two hundred twenty-one thousand, four hundred forty-eight".