243115404415 has 16 divisors (see below), whose sum is σ = 315995990688. Its totient is φ = 178493613696.

The previous prime is 243115404407. The next prime is 243115404437. The reversal of 243115404415 is 514404511342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243115404415 - 2³ = 243115404407 is a prime.

It is a Duffinian number.

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, 10798689 + ... + 10821178.

It is an arithmetic number, because the mean of its divisors is an integer number (19749749418).

Almost surely, 2^243115404415 is an apocalyptic number.

243115404415 is a deficient number, since it is larger than the sum of its proper divisors (72880586273).

243115404415 is a wasteful number, since it uses less digits than its factorization.

243115404415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21620058.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 243115404415 its reverse (514404511342), we get a palindrome (757519915757).

The spelling of 243115404415 in words is "two hundred forty-three billion, one hundred fifteen million, four hundred four thousand, four hundred fifteen".