243240501400 has 48 divisors (see below), whose sum is σ = 609036800400. Its totient is φ = 89811876480.

The previous prime is 243240501391. The next prime is 243240501403. The reversal of 243240501400 is 4105042342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243240501403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46774420 + ... + 46779619.

It is an arithmetic number, because the mean of its divisors is an integer number (12688266675).

Almost surely, 2^243240501400 is an apocalyptic number.

243240501400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243240501400 is an abundant number, since it is smaller than the sum of its proper divisors (365796299000).

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

243240501400 is a wasteful number, since it uses less digits than its factorization.

243240501400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93554068 (or 93554059 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 243240501400 its reverse (4105042342), we get a palindrome (247345543742).

The spelling of 243240501400 in words is "two hundred forty-three billion, two hundred forty million, five hundred one thousand, four hundred".