243144321 has 12 divisors (see below), whose sum is σ = 377122032. Its totient is φ = 138939528.

The previous prime is 243144313. The next prime is 243144379. The reversal of 243144321 is 123441342.

243144321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243144321 - 2³ = 243144313 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243144291 and 243144300.

It is not an unprimeable number, because it can be changed into a prime (243142321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 826875 + ... + 827168.

It is an arithmetic number, because the mean of its divisors is an integer number (31426836).

Almost surely, 2^243144321 is an apocalyptic number.

243144321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243144321 is a deficient number, since it is larger than the sum of its proper divisors (133977711).

243144321 is a wasteful number, since it uses less digits than its factorization.

243144321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654060 (or 1654053 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 243144321 is about 15593.0856792362. The cubic root of 243144321 is about 624.1486614695.

Adding to 243144321 its reverse (123441342), we get a palindrome (366585663).

The spelling of 243144321 in words is "two hundred forty-three million, one hundred forty-four thousand, three hundred twenty-one".