243642181100 has 18 divisors (see below), whose sum is σ = 528703533204. Its totient is φ = 97456872400.

The previous prime is 243642181099. The next prime is 243642181103. The reversal of 243642181100 is 1181246342.

It is a super-2 number, since 2×243642181100² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243642181103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1218210806 + ... + 1218211005.

Almost surely, 2^243642181100 is an apocalyptic number.

243642181100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243642181100 is an abundant number, since it is smaller than the sum of its proper divisors (285061352104).

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

243642181100 is a wasteful number, since it uses less digits than its factorization.

243642181100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436421825 (or 2436421818 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 243642181100 in words is "two hundred forty-three billion, six hundred forty-two million, one hundred eighty-one thousand, one hundred".