243130544140 has 72 divisors (see below), whose sum is σ = 561325968000. Its totient is φ = 88392775680.

The previous prime is 243130544101. The next prime is 243130544141. The reversal of 243130544140 is 41445031342.

It is a super-2 number, since 2×243130544140² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243130544141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18344236 + ... + 18357484.

It is an arithmetic number, because the mean of its divisors is an integer number (7796194000).

Almost surely, 2^243130544140 is an apocalyptic number.

243130544140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243130544140 is an abundant number, since it is smaller than the sum of its proper divisors (318195423860).

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

243130544140 is a wasteful number, since it uses less digits than its factorization.

243130544140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20863 (or 20850 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 243130544140 its reverse (41445031342), we get a palindrome (284575575482).

The spelling of 243130544140 in words is "two hundred forty-three billion, one hundred thirty million, five hundred forty-four thousand, one hundred forty".