243775236220 has 48 divisors (see below), whose sum is σ = 524448983520. Its totient is φ = 95130475776.

The previous prime is 243775236197. The next prime is 243775236253. The reversal of 243775236220 is 22632577342.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 15 ways as a sum of consecutive naturals, for example, 567426 + ... + 899734.

It is an arithmetic number, because the mean of its divisors is an integer number (10926020490).

Almost surely, 2^243775236220 is an apocalyptic number.

243775236220 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 243775236220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262224491760).

243775236220 is an abundant number, since it is smaller than the sum of its proper divisors (280673747300).

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

243775236220 is a wasteful number, since it uses less digits than its factorization.

243775236220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333214 (or 333212 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 43.

The spelling of 243775236220 in words is "two hundred forty-three billion, seven hundred seventy-five million, two hundred thirty-six thousand, two hundred twenty".