243540238422 has 64 divisors (see below), whose sum is σ = 538887331584. Its totient is φ = 72888232320.

The previous prime is 243540238421. The next prime is 243540238423. The reversal of 243540238422 is 224832045342.

It is an interprime number because it is at equal distance from previous prime (243540238421) and next prime (243540238423).

It is a super-3 number, since 3×243540238422³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243540238421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11334133 + ... + 11355599.

It is an arithmetic number, because the mean of its divisors is an integer number (8420114556).

Almost surely, 2^243540238422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243540238422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269443665792).

243540238422 is an abundant number, since it is smaller than the sum of its proper divisors (295347093162).

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

243540238422 is a wasteful number, since it uses less digits than its factorization.

243540238422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25453.

The product of its (nonzero) digits is 368640, while the sum is 39.

The spelling of 243540238422 in words is "two hundred forty-three billion, five hundred forty million, two hundred thirty-eight thousand, four hundred twenty-two".