243135212552 has 8 divisors (see below), whose sum is σ = 455878523550. Its totient is φ = 121567606272.

The previous prime is 243135212543. The next prime is 243135212599. The reversal of 243135212552 is 255212531342.

It can be written as a sum of positive squares in only one way, i.e., 158042822116 + 85092390436 = 397546^2 + 291706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×243135212552² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15195950777 + ... + 15195950792.

Almost surely, 2^243135212552 is an apocalyptic number.

It is an amenable number.

243135212552 is a deficient number, since it is larger than the sum of its proper divisors (212743310998).

243135212552 is a wasteful number, since it uses less digits than its factorization.

243135212552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30391901575 (or 30391901571 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

Adding to 243135212552 its reverse (255212531342), we get a palindrome (498347743894).

The spelling of 243135212552 in words is "two hundred forty-three billion, one hundred thirty-five million, two hundred twelve thousand, five hundred fifty-two".