243523245240 has 384 divisors, whose sum is σ = 881078627520. Its totient is φ = 57839616000.

The previous prime is 243523245223. The next prime is 243523245253. The reversal of 243523245240 is 42542325342.

243523245240 is a `hidden beast` number, since 2 + 43 + 52 + 324 + 5 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 243523245195 and 243523245204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 38792982 + ... + 38799258.

Almost surely, 2^243523245240 is an apocalyptic number.

243523245240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243523245240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440539313760).

243523245240 is an abundant number, since it is smaller than the sum of its proper divisors (637555382280).

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

243523245240 is a wasteful number, since it uses less digits than its factorization.

243523245240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6503 (or 6496 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 36.

The spelling of 243523245240 in words is "two hundred forty-three billion, five hundred twenty-three million, two hundred forty-five thousand, two hundred forty".