243401033220040 has 64 divisors (see below), whose sum is σ = 548969155056000. Its totient is φ = 97126318417920.

The previous prime is 243401033220031. The next prime is 243401033220053. The reversal of 243401033220040 is 40022330104342.

It is a junction number, because it is equal to n+sod(n) for n = 243401033219990 and 243401033220008.

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, 1378103256 + ... + 1378279864.

It is an arithmetic number, because the mean of its divisors is an integer number (8577643047750).

Almost surely, 2^{243401033220040} is an apocalyptic number.

243401033220040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243401033220040 is an abundant number, since it is smaller than the sum of its proper divisors (305568121835960).

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

243401033220040 is a wasteful number, since it uses less digits than its factorization.

243401033220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259270 (or 259266 counting only the distinct ones).

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

Adding to 243401033220040 its reverse (40022330104342), we get a palindrome (283423363324382).

The spelling of 243401033220040 in words is "two hundred forty-three trillion, four hundred one billion, thirty-three million, two hundred twenty thousand, forty".