243443230420 has 48 divisors (see below), whose sum is σ = 550646521488. Its totient is φ = 89871989760.

The previous prime is 243443230411. The next prime is 243443230421. The reversal of 243443230420 is 24032344342.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 63570545424 + 179872684996 = 252132^2 + 424114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243443230421) 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, 1580262 + ... + 1727458.

It is an arithmetic number, because the mean of its divisors is an integer number (11471802531).

Almost surely, 2^243443230420 is an apocalyptic number.

243443230420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243443230420 is an abundant number, since it is smaller than the sum of its proper divisors (307203291068).

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

243443230420 is a wasteful number, since it uses less digits than its factorization.

243443230420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153580 (or 153578 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 31.

Adding to 243443230420 its reverse (24032344342), we get a palindrome (267475574762).

The spelling of 243443230420 in words is "two hundred forty-three billion, four hundred forty-three million, two hundred thirty thousand, four hundred twenty".