243011003240 has 128 divisors (see below), whose sum is σ = 576478425600. Its totient is φ = 92088084480.

The previous prime is 243011003231. The next prime is 243011003293. The reversal of 243011003240 is 42300110342.

It is a super-2 number, since 2×243011003240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 31 ways as a sum of consecutive naturals, for example, 12190001 + ... + 12209919.

It is an arithmetic number, because the mean of its divisors is an integer number (4503737700).

Almost surely, 2^243011003240 is an apocalyptic number.

243011003240 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 243011003240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288239212800).

243011003240 is an abundant number, since it is smaller than the sum of its proper divisors (333467422360).

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

243011003240 is a wasteful number, since it uses less digits than its factorization.

243011003240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20187 (or 20183 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 243011003240 its reverse (42300110342), we get a palindrome (285311113582).

The spelling of 243011003240 in words is "two hundred forty-three billion, eleven million, three thousand, two hundred forty".