243232433520 has 160 divisors (see below), whose sum is σ = 773140515840. Its totient is φ = 63228288000.

The previous prime is 243232433489. The next prime is 243232433557. The reversal of 243232433520 is 25334232342.

It is a happy number.

It is a super-2 number, since 2×243232433520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2788326 + ... + 2874234.

It is an arithmetic number, because the mean of its divisors is an integer number (4832128224).

Almost surely, 2^243232433520 is an apocalyptic number.

243232433520 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 243232433520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386570257920).

243232433520 is an abundant number, since it is smaller than the sum of its proper divisors (529908082320).

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

243232433520 is a wasteful number, since it uses less digits than its factorization.

243232433520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86223 (or 86217 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 33.

Adding to 243232433520 its reverse (25334232342), we get a palindrome (268566665862).

The spelling of 243232433520 in words is "two hundred forty-three billion, two hundred thirty-two million, four hundred thirty-three thousand, five hundred twenty".