243213122240 has 112 divisors (see below), whose sum is σ = 632827710720. Its totient is φ = 88297466880.

The previous prime is 243213122237. The next prime is 243213122263. The reversal of 243213122240 is 42221312342.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2123069 + ... + 2234691.

Almost surely, 2^243213122240 is an apocalyptic number.

243213122240 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 243213122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316413855360).

243213122240 is an abundant number, since it is smaller than the sum of its proper divisors (389614588480).

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

243213122240 is a wasteful number, since it uses less digits than its factorization.

243213122240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112270 (or 112260 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 243213122240 its reverse (42221312342), we get a palindrome (285434434582).

The spelling of 243213122240 in words is "two hundred forty-three billion, two hundred thirteen million, one hundred twenty-two thousand, two hundred forty".