243274573520 has 40 divisors (see below), whose sum is σ = 617032784160. Its totient is φ = 88463480960.

The previous prime is 243274573483. The next prime is 243274573567. The reversal of 243274573520 is 25375472342.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 138223310 + ... + 138225069.

It is an arithmetic number, because the mean of its divisors is an integer number (15425819604).

Almost surely, 2^243274573520 is an apocalyptic number.

243274573520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243274573520 is an abundant number, since it is smaller than the sum of its proper divisors (373758210640).

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

243274573520 is a wasteful number, since it uses less digits than its factorization.

243274573520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276448403 (or 276448397 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 44.

The spelling of 243274573520 in words is "two hundred forty-three billion, two hundred seventy-four million, five hundred seventy-three thousand, five hundred twenty".