243123503322 has 64 divisors (see below), whose sum is σ = 568419404544. Its totient is φ = 67889802240.

The previous prime is 243123503281. The next prime is 243123503327. The reversal of 243123503322 is 223305321342.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 243123503322.

It is not an unprimeable number, because it can be changed into a prime (243123503327) by changing a digit.

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, 100018 + ... + 704450.

It is an arithmetic number, because the mean of its divisors is an integer number (8881553196).

Almost surely, 2^243123503322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243123503322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284209702272).

243123503322 is an abundant number, since it is smaller than the sum of its proper divisors (325295901222).

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

243123503322 is a wasteful number, since it uses less digits than its factorization.

243123503322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604663.

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 243123503322 its reverse (223305321342), we get a palindrome (466428824664).

The spelling of 243123503322 in words is "two hundred forty-three billion, one hundred twenty-three million, five hundred three thousand, three hundred twenty-two".