243143430040 has 64 divisors (see below), whose sum is σ = 652409717760. Its totient is φ = 79738961280.

The previous prime is 243143430037. The next prime is 243143430071. The reversal of 243143430040 is 40034341342.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 243143429990 and 243143430008.

It is a congruent number.

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, 18871156 + ... + 18884035.

It is an arithmetic number, because the mean of its divisors is an integer number (10193901840).

Almost surely, 2^243143430040 is an apocalyptic number.

243143430040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243143430040 is an abundant number, since it is smaller than the sum of its proper divisors (409266287720).

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

243143430040 is a wasteful number, since it uses less digits than its factorization.

243143430040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37755232 (or 37755228 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 243143430040 its reverse (40034341342), we get a palindrome (283177771382).

The spelling of 243143430040 in words is "two hundred forty-three billion, one hundred forty-three million, four hundred thirty thousand, forty".