243131475407247 has 24 divisors (see below), whose sum is σ = 402219338990976. Its totient is φ = 138634772133456.

The previous prime is 243131475407237. The next prime is 243131475407279. The reversal of 243131475407247 is 742704574131342.

243131475407247 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 31 + 47 + 540 + 7 + 24 + 7 = 666.

It is not a de Polignac number, because 243131475407247 - 2²⁷ = 243131341189519 is a prime.

It is a super-3 number, since 3×243131475407247³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 243131475407193 and 243131475407202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243131475407207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4131908233 + ... + 4131967074.

It is an arithmetic number, because the mean of its divisors is an integer number (16759139124624).

Almost surely, 2^{243131475407247} is an apocalyptic number.

243131475407247 is a deficient number, since it is larger than the sum of its proper divisors (159087863583729).

243131475407247 is a wasteful number, since it uses less digits than its factorization.

243131475407247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8263875787 (or 8263875784 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 54.

The spelling of 243131475407247 in words is "two hundred forty-three trillion, one hundred thirty-one billion, four hundred seventy-five million, four hundred seven thousand, two hundred forty-seven".