243121232228 has 12 divisors (see below), whose sum is σ = 486242464512. Its totient is φ = 104194813800.

The previous prime is 243121232227. The next prime is 243121232267. The reversal of 243121232228 is 822232121342.

243121232228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

243121232228 is an admirable number.

It is a super-2 number, since 2×243121232228² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243121232194 and 243121232203.

It is not an unprimeable number, because it can be changed into a prime (243121232227) 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 3 ways as a sum of consecutive naturals, for example, 4341450548 + ... + 4341450603.

It is an arithmetic number, because the mean of its divisors is an integer number (40520205376).

Almost surely, 2^243121232228 is an apocalyptic number.

243121232228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243121232228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

243121232228 is a wasteful number, since it uses less digits than its factorization.

243121232228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682901162 (or 8682901160 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The spelling of 243121232228 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty-eight".