243404223140 has 48 divisors (see below), whose sum is σ = 550597143600. Its totient is φ = 89851246080.

The previous prime is 243404223137. The next prime is 243404223163. The reversal of 243404223140 is 41322404342.

It can be written as a sum of positive squares in 8 ways, for example, as 112471695424 + 130932527716 = 335368^2 + 361846^2 .

It is a super-2 number, since 2×243404223140² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023110 + ... + 1238370.

It is an arithmetic number, because the mean of its divisors is an integer number (11470773825).

Almost surely, 2^243404223140 is an apocalyptic number.

243404223140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243404223140 is an abundant number, since it is smaller than the sum of its proper divisors (307192920460).

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

243404223140 is a wasteful number, since it uses less digits than its factorization.

243404223140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219632 (or 219630 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 243404223140 its reverse (41322404342), we get a palindrome (284726627482).

The spelling of 243404223140 in words is "two hundred forty-three billion, four hundred four million, two hundred twenty-three thousand, one hundred forty".