243243011400 has 96 divisors (see below), whose sum is σ = 755496094560. Its totient is φ = 64740695040.

The previous prime is 243243011381. The next prime is 243243011437. The reversal of 243243011400 is 4110342342.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 23 ways as a sum of consecutive naturals, for example, 73777 + ... + 701376.

It is an arithmetic number, because the mean of its divisors is an integer number (7869750985).

Almost surely, 2^243243011400 is an apocalyptic number.

243243011400 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 243243011400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377748047280).

243243011400 is an abundant number, since it is smaller than the sum of its proper divisors (512253083160).

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

243243011400 is a wasteful number, since it uses less digits than its factorization.

243243011400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775695 (or 775686 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 243243011400 its reverse (4110342342), we get a palindrome (247353353742).

The spelling of 243243011400 in words is "two hundred forty-three billion, two hundred forty-three million, eleven thousand, four hundred".