243121245508 has 12 divisors (see below), whose sum is σ = 425812940140. Its totient is φ = 121460405472.

The previous prime is 243121245473. The next prime is 243121245509. The reversal of 243121245508 is 805542121342.

243121245508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 91108592964 + 152012652544 = 301842^2 + 389888^2 .

It is a super-2 number, since 2×243121245508² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (243121245509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25048863 + ... + 25058566.

Almost surely, 2^243121245508 is an apocalyptic number.

It is an amenable number.

243121245508 is a deficient number, since it is larger than the sum of its proper divisors (182691694632).

243121245508 is a wasteful number, since it uses less digits than its factorization.

243121245508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50108646 (or 50108644 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 243121245508 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, five hundred eight".