243121243152 has 20 divisors (see below), whose sum is σ = 628063211600. Its totient is φ = 81040414368.

The previous prime is 243121243117. The next prime is 243121243171. The reversal of 243121243152 is 251342121342.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532512902 + ... + 2532512997.

It is an arithmetic number, because the mean of its divisors is an integer number (31403160580).

Almost surely, 2^243121243152 is an apocalyptic number.

It is an amenable number.

243121243152 is an abundant number, since it is smaller than the sum of its proper divisors (384941968448).

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

243121243152 is a wasteful number, since it uses less digits than its factorization.

243121243152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065025910 (or 5065025904 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 243121243152 its reverse (251342121342), we get a palindrome (494463364494).

The spelling of 243121243152 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-three thousand, one hundred fifty-two".