243343100 has 324 divisors, whose sum is σ = 760545072. Its totient is φ = 65894400.

The previous prime is 243343073. The next prime is 243343109. The reversal of 243343100 is 1343342.

It is a super-2 number, since 2×243343100² = 118431728635220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243343109) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 14314292 + ... + 14314308.

Almost surely, 2^243343100 is an apocalyptic number.

243343100 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 243343100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380272536).

243343100 is an abundant number, since it is smaller than the sum of its proper divisors (517201972).

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

243343100 is a wasteful number, since it uses less digits than its factorization.

243343100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 243343100 is about 15599.4583239291. The cubic root of 243343100 is about 624.3187029381.

Adding to 243343100 its reverse (1343342), we get a palindrome (244686442).

It can be divided in two parts, 243 and 343100, that added together give a palindrome (343343).

The spelling of 243343100 in words is "two hundred forty-three million, three hundred forty-three thousand, one hundred".