243133100 has 162 divisors, whose sum is σ = 646403940. Its totient is φ = 79121280.

The previous prime is 243133097. The next prime is 243133147. The reversal of 243133100 is 1331342.

It is a happy number.

It is a super-2 number, since 2×243133100² = 118227408631220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 4120871 + ... + 4120929.

Almost surely, 2^243133100 is an apocalyptic number.

243133100 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 243133100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323201970).

243133100 is an abundant number, since it is smaller than the sum of its proper divisors (403270840).

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

243133100 is a wasteful number, since it uses less digits than its factorization.

243133100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 243133100 is about 15592.7258681733. The cubic root of 243133100 is about 624.1390599294.

Adding to 243133100 its reverse (1331342), we get a palindrome (244464442).

The spelling of 243133100 in words is "two hundred forty-three million, one hundred thirty-three thousand, one hundred".