243012100 has 72 divisors (see below), whose sum is σ = 548242688. Its totient is φ = 93398400.

The previous prime is 243012053. The next prime is 243012101. The reversal of 243012100 is 1210342.

It is not an unprimeable number, because it can be changed into a prime (243012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 858559 + ... + 858841.

Almost surely, 2^243012100 is an apocalyptic number.

243012100 is a gapful number since it is divisible by the number (20) 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 243012100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274121344).

243012100 is an abundant number, since it is smaller than the sum of its proper divisors (305230588).

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

243012100 is a wasteful number, since it uses less digits than its factorization.

243012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 243012100 is about 15588.8453709696. The cubic root of 243012100 is about 624.0355043627.

Adding to 243012100 its reverse (1210342), we get a palindrome (244222442).

The spelling of 243012100 in words is "two hundred forty-three million, twelve thousand, one hundred".