243212424 has 128 divisors (see below), whose sum is σ = 753527040. Its totient is φ = 63700992.

The previous prime is 243212413. The next prime is 243212441. The reversal of 243212424 is 424212342.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 243212394 and 243212403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 421224 + ... + 421800.

It is an arithmetic number, because the mean of its divisors is an integer number (5886930).

Almost surely, 2^243212424 is an apocalyptic number.

243212424 is a gapful number since it is divisible by the number (24) 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 243212424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376763520).

243212424 is an abundant number, since it is smaller than the sum of its proper divisors (510314616).

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

243212424 is a wasteful number, since it uses less digits than its factorization.

243212424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 795 counting only the distinct ones).

The product of its digits is 3072, while the sum is 24.

The square root of 243212424 is about 15595.2692827024. The cubic root of 243212424 is about 624.2069292343.

Adding to 243212424 its reverse (424212342), we get a palindrome (667424766).

The spelling of 243212424 in words is "two hundred forty-three million, two hundred twelve thousand, four hundred twenty-four".