243281621232 has 80 divisors (see below), whose sum is σ = 752024402080. Its totient is φ = 74855881728.

The previous prime is 243281621227. The next prime is 243281621243. The reversal of 243281621232 is 232126182342.

243281621232 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 8 + 1 + 621 + 23 + 2 = 666.

243281621232 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 nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21654073 + ... + 21665304.

It is an arithmetic number, because the mean of its divisors is an integer number (9400305026).

Almost surely, 2^243281621232 is an apocalyptic number.

It is an amenable number.

243281621232 is an abundant number, since it is smaller than the sum of its proper divisors (508742780848).

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

243281621232 is a wasteful number, since it uses less digits than its factorization.

243281621232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43319407 (or 43319395 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The spelling of 243281621232 in words is "two hundred forty-three billion, two hundred eighty-one million, six hundred twenty-one thousand, two hundred thirty-two".