243211140 has 48 divisors (see below), whose sum is σ = 756658560. Its totient is φ = 64856160.

The previous prime is 243211127. The next prime is 243211141. The reversal of 243211140 is 41112342.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (243211141) 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, 224656 + ... + 225735.

It is an arithmetic number, because the mean of its divisors is an integer number (15763720).

Almost surely, 2^243211140 is an apocalyptic number.

243211140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243211140 is an abundant number, since it is smaller than the sum of its proper divisors (513447420).

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

243211140 is a wasteful number, since it uses less digits than its factorization.

243211140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450409 (or 450401 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 243211140 is about 15595.2281163181. The cubic root of 243211140 is about 624.2058307665.

Adding to 243211140 its reverse (41112342), we get a palindrome (284323482).

The spelling of 243211140 in words is "two hundred forty-three million, two hundred eleven thousand, one hundred forty".