243134040505 has 8 divisors (see below), whose sum is σ = 291844974600. Its totient is φ = 194451148416.

The previous prime is 243134040449. The next prime is 243134040517. The reversal of 243134040505 is 505040431342.

It can be written as a sum of positive squares in 4 ways, for example, as 30118561209 + 213015479296 = 173547^2 + 461536^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243134040505 is a prime.

It is a super-2 number, since 2×243134040505² (a number of 24 digits) contains 22 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, 6991420 + ... + 7026109.

It is an arithmetic number, because the mean of its divisors is an integer number (36480621825).

Almost surely, 2^243134040505 is an apocalyptic number.

It is an amenable number.

243134040505 is a deficient number, since it is larger than the sum of its proper divisors (48710934095).

243134040505 is a wasteful number, since it uses less digits than its factorization.

243134040505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14021003.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 243134040505 its reverse (505040431342), we get a palindrome (748174471847).

The spelling of 243134040505 in words is "two hundred forty-three billion, one hundred thirty-four million, forty thousand, five hundred five".