243031140520 has 64 divisors (see below), whose sum is σ = 629131536000. Its totient is φ = 82765720320.

The previous prime is 243031140509. The next prime is 243031140533. The reversal of 243031140520 is 25041130342.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2870926 + ... + 2954365.

It is an arithmetic number, because the mean of its divisors is an integer number (9830180250).

Almost surely, 2^243031140520 is an apocalyptic number.

243031140520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243031140520 is an abundant number, since it is smaller than the sum of its proper divisors (386100395480).

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

243031140520 is a wasteful number, since it uses less digits than its factorization.

243031140520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825458 (or 5825454 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 243031140520 its reverse (25041130342), we get a palindrome (268072270862).

The spelling of 243031140520 in words is "two hundred forty-three billion, thirty-one million, one hundred forty thousand, five hundred twenty".