243130133520 has 160 divisors (see below), whose sum is σ = 886710032640. Its totient is φ = 61020887040.

The previous prime is 243130133513. The next prime is 243130133549. The reversal of 243130133520 is 25331031342.

243130133520 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 3 + 0 + 133 + 520 = 666.

243130133520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243130133520² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3273876 + ... + 3347315.

It is an arithmetic number, because the mean of its divisors is an integer number (5541937704).

Almost surely, 2^243130133520 is an apocalyptic number.

243130133520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243130133520 is an abundant number, since it is smaller than the sum of its proper divisors (643579899120).

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

243130133520 is a wasteful number, since it uses less digits than its factorization.

243130133520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621230 (or 6621218 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 243130133520 its reverse (25331031342), we get a palindrome (268461164862).

The spelling of 243130133520 in words is "two hundred forty-three billion, one hundred thirty million, one hundred thirty-three thousand, five hundred twenty".