243121531152 has 40 divisors (see below), whose sum is σ = 628609766400. Its totient is φ = 80970083200.

The previous prime is 243121531139. The next prime is 243121531207. The reversal of 243121531152 is 251135121342.

It is a happy number.

243121531152 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×243121531152³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2145027 + ... + 2255522.

It is an arithmetic number, because the mean of its divisors is an integer number (15715244160).

Almost surely, 2^243121531152 is an apocalyptic number.

It is an amenable number.

243121531152 is an abundant number, since it is smaller than the sum of its proper divisors (385488235248).

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

243121531152 is a wasteful number, since it uses less digits than its factorization.

243121531152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401711 (or 4401705 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

Adding to 243121531152 its reverse (251135121342), we get a palindrome (494256652494).

The spelling of 243121531152 in words is "two hundred forty-three billion, one hundred twenty-one million, five hundred thirty-one thousand, one hundred fifty-two".