243231100 has 54 divisors (see below), whose sum is σ = 613997160. Its totient is φ = 83391840.

The previous prime is 243231083. The next prime is 243231113. The reversal of 243231100 is 1132342.

It is a happy number.

243231100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243231100² = 118322736014420000, which contains 22 as substring.

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 17 ways as a sum of consecutive naturals, for example, 19920 + ... + 29719.

Almost surely, 2^243231100 is an apocalyptic number.

243231100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243231100 is an abundant number, since it is smaller than the sum of its proper divisors (370766060).

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

243231100 is a wasteful number, since it uses less digits than its factorization.

243231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49667 (or 49653 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 243231100 is about 15595.8680425297. The cubic root of 243231100 is about 624.2229062008. Note that the first 3 decimals are identical.

Adding to 243231100 its reverse (1132342), we get a palindrome (244363442).

The spelling of 243231100 in words is "two hundred forty-three million, two hundred thirty-one thousand, one hundred".