243155042005 has 16 divisors (see below), whose sum is σ = 308966806080. Its totient is φ = 183071446272.

The previous prime is 243155041973. The next prime is 243155042047. The reversal of 243155042005 is 500240551342.

It is a cyclic number.

It is not a de Polignac number, because 243155042005 - 2⁵ = 243155041973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1733386 + ... + 1868404.

It is an arithmetic number, because the mean of its divisors is an integer number (19310425380).

Almost surely, 2^243155042005 is an apocalyptic number.

It is an amenable number.

243155042005 is a deficient number, since it is larger than the sum of its proper divisors (65811764075).

243155042005 is a wasteful number, since it uses less digits than its factorization.

243155042005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156228.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 243155042005 its reverse (500240551342), we get a palindrome (743395593347).

The spelling of 243155042005 in words is "two hundred forty-three billion, one hundred fifty-five million, forty-two thousand, five".