243201040040 has 128 divisors (see below), whose sum is σ = 667808409600. Its totient is φ = 77910819840.

The previous prime is 243201040037. The next prime is 243201040067. The reversal of 243201040040 is 40040102342.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 243201039994 and 243201040021.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231359 + ... + 734798.

It is an arithmetic number, because the mean of its divisors is an integer number (5217253200).

Almost surely, 2^243201040040 is an apocalyptic number.

243201040040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243201040040 is an abundant number, since it is smaller than the sum of its proper divisors (424607369560).

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

243201040040 is a wasteful number, since it uses less digits than its factorization.

243201040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966235 (or 966231 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 243201040040 its reverse (40040102342), we get a palindrome (283241142382).

The spelling of 243201040040 in words is "two hundred forty-three billion, two hundred one million, forty thousand, forty".