243204410421 has 48 divisors (see below), whose sum is σ = 402368368896. Its totient is φ = 138666947328.

The previous prime is 243204410369. The next prime is 243204410429. The reversal of 243204410421 is 124014402342.

243204410421 is a `hidden beast` number, since 2 + 4 + 3 + 204 + 410 + 42 + 1 = 666.

It is not a de Polignac number, because 243204410421 - 2⁶ = 243204410357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243204410429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67686601 + ... + 67690193.

It is an arithmetic number, because the mean of its divisors is an integer number (8382674352).

Almost surely, 2^243204410421 is an apocalyptic number.

243204410421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243204410421 is a deficient number, since it is larger than the sum of its proper divisors (159163958475).

243204410421 is a wasteful number, since it uses less digits than its factorization.

243204410421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682 (or 5679 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 243204410421 its reverse (124014402342), we get a palindrome (367218812763).

The spelling of 243204410421 in words is "two hundred forty-three billion, two hundred four million, four hundred ten thousand, four hundred twenty-one".