243138036 has 48 divisors (see below), whose sum is σ = 583305408. Its totient is φ = 78777600.

The previous prime is 243138031. The next prime is 243138047. The reversal of 243138036 is 630831342.

It is a super-2 number, since 2×243138036² = 118232209099874592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243137994 and 243138012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243138031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162106 + ... + 163598.

It is an arithmetic number, because the mean of its divisors is an integer number (12152196).

Almost surely, 2^243138036 is an apocalyptic number.

It is an amenable number.

243138036 is an abundant number, since it is smaller than the sum of its proper divisors (340167372).

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

243138036 is a wasteful number, since it uses less digits than its factorization.

243138036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872 (or 1870 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 243138036 is about 15592.8841463021. The cubic root of 243138036 is about 624.1432835824.

Adding to 243138036 its reverse (630831342), we get a palindrome (873969378).

The spelling of 243138036 in words is "two hundred forty-three million, one hundred thirty-eight thousand, thirty-six".