243121215416 has 16 divisors (see below), whose sum is σ = 456747870600. Its totient is φ = 121321783264.

The previous prime is 243121215413. The next prime is 243121215427. The reversal of 243121215416 is 614512121342.

It is a super-3 number, since 3×243121215416³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121215413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29848730 + ... + 29856873.

Almost surely, 2^243121215416 is an apocalyptic number.

It is an amenable number.

243121215416 is a deficient number, since it is larger than the sum of its proper divisors (213626655184).

243121215416 is a wasteful number, since it uses less digits than its factorization.

243121215416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59706118 (or 59706114 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

Adding to 243121215416 its reverse (614512121342), we get a palindrome (857633336758).

The spelling of 243121215416 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred fifteen thousand, four hundred sixteen".