243234253505 has 8 divisors (see below), whose sum is σ = 309050581032. Its totient is φ = 183141084928.

The previous prime is 243234253489. The next prime is 243234253513. The reversal of 243234253505 is 505352432342.

It can be written as a sum of positive squares in 4 ways, for example, as 98950510096 + 144283743409 = 314564^2 + 379847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243234253505 - 2⁴ = 243234253489 is a prime.

It is a super-3 number, since 3×243234253505³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

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, 1430789642 + ... + 1430789811.

It is an arithmetic number, because the mean of its divisors is an integer number (38631322629).

Almost surely, 2^243234253505 is an apocalyptic number.

It is an amenable number.

243234253505 is a deficient number, since it is larger than the sum of its proper divisors (65816327527).

243234253505 is a wasteful number, since it uses less digits than its factorization.

243234253505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861579475.

The product of its (nonzero) digits is 432000, while the sum is 38.

Adding to 243234253505 its reverse (505352432342), we get a palindrome (748586685847).

The spelling of 243234253505 in words is "two hundred forty-three billion, two hundred thirty-four million, two hundred fifty-three thousand, five hundred five".