243320520344 has 64 divisors (see below), whose sum is σ = 532775664000. Its totient is φ = 103003211520.

The previous prime is 243320520341. The next prime is 243320520361. The reversal of 243320520344 is 443025023342.

It is a self number, because there is not a number n which added to its sum of digits gives 243320520344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243320520341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1134629 + ... + 1331924.

It is an arithmetic number, because the mean of its divisors is an integer number (8324619750).

Almost surely, 2^243320520344 is an apocalyptic number.

It is an amenable number.

243320520344 is an abundant number, since it is smaller than the sum of its proper divisors (289455143656).

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

243320520344 is a wasteful number, since it uses less digits than its factorization.

243320520344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466648 (or 2466644 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 32.

Adding to 243320520344 its reverse (443025023342), we get a palindrome (686345543686).

The spelling of 243320520344 in words is "two hundred forty-three billion, three hundred twenty million, five hundred twenty thousand, three hundred forty-four".