243442100 has 36 divisors (see below), whose sum is σ = 576296448. Its totient is φ = 88524000.

The previous prime is 243442063. The next prime is 243442127. The reversal of 243442100 is 1244342.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109556 + ... + 111755.

Almost surely, 2^243442100 is an apocalyptic number.

243442100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243442100 is an abundant number, since it is smaller than the sum of its proper divisors (332854348).

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

243442100 is a wasteful number, since it uses less digits than its factorization.

243442100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221336 (or 221329 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 243442100 is about 15602.6311883605. The cubic root of 243442100 is about 624.4033559400.

Adding to 243442100 its reverse (1244342), we get a palindrome (244686442).

The spelling of 243442100 in words is "two hundred forty-three million, four hundred forty-two thousand, one hundred".