243135212553 has 6 divisors (see below), whose sum is σ = 351195307034. Its totient is φ = 162090141696.

The previous prime is 243135212543. The next prime is 243135212599. The reversal of 243135212553 is 355212531342.

243135212553 is a `hidden beast` number, since 2 + 43 + 1 + 3 + 52 + 12 + 553 = 666.

It can be written as a sum of positive squares in only one way, i.e., 238370485824 + 4764726729 = 488232^2 + 69027^2 .

It is not a de Polignac number, because 243135212553 - 2⁵ = 243135212521 is a prime.

It is a super-2 number, since 2×243135212553² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243135212503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13507511800 + ... + 13507511817.

Almost surely, 2^243135212553 is an apocalyptic number.

It is an amenable number.

243135212553 is a deficient number, since it is larger than the sum of its proper divisors (108060094481).

243135212553 is a wasteful number, since it uses less digits than its factorization.

243135212553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27015023623 (or 27015023620 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 243135212553 its reverse (355212531342), we get a palindrome (598347743895).

The spelling of 243135212553 in words is "two hundred forty-three billion, one hundred thirty-five million, two hundred twelve thousand, five hundred fifty-three".