243054425421 has 12 divisors (see below), whose sum is σ = 355887911548. Its totient is φ = 159816608064.

The previous prime is 243054425417. The next prime is 243054425423. The reversal of 243054425421 is 124524450342.

243054425421 is a `hidden beast` number, since 2 + 43 + 0 + 544 + 2 + 54 + 21 = 666.

243054425421 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 208653449796 + 34400975625 = 456786^2 + 185475^2 .

It is not a de Polignac number, because 243054425421 - 2² = 243054425417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243054425423) 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 11 ways as a sum of consecutive naturals, for example, 184972270 + ... + 184973583.

Almost surely, 2^243054425421 is an apocalyptic number.

It is an amenable number.

243054425421 is a deficient number, since it is larger than the sum of its proper divisors (112833486127).

243054425421 is a wasteful number, since it uses less digits than its factorization.

243054425421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369945932 (or 369945929 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 243054425421 its reverse (124524450342), we get a palindrome (367578875763).

The spelling of 243054425421 in words is "two hundred forty-three billion, fifty-four million, four hundred twenty-five thousand, four hundred twenty-one".