243847328481 has 27 divisors (see below), whose sum is σ = 354210101427. Its totient is φ = 161653314240.

The previous prime is 243847328479. The next prime is 243847328507. The reversal of 243847328481 is 184823748342.

The square root of 243847328481 is 493809.

It is a perfect power (a square), and thus also a powerful number.

243847328481 is a `hidden beast` number, since 243 + 8 + 47 + 3 + 284 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 183390354081 + 60456974400 = 428241^2 + 245880^2 .

It is not a de Polignac number, because 243847328481 - 2¹ = 243847328479 is a prime.

It is a super-2 number, since 2×243847328481² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (243847328401) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 357023566 + ... + 357024248.

Almost surely, 2^243847328481 is an apocalyptic number.

243847328481 is the 493809-th square number.

243847328481 is the 246905-th centered octagonal number.

It is an amenable number.

243847328481 is a deficient number, since it is larger than the sum of its proper divisors (110362772946).

243847328481 is an frugal number, since it uses more digits than its factorization.

243847328481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854 (or 927 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 54.

The spelling of 243847328481 in words is "two hundred forty-three billion, eight hundred forty-seven million, three hundred twenty-eight thousand, four hundred eighty-one".