243287221716651 has 32 divisors (see below), whose sum is σ = 371162942323200. Its totient is φ = 138856506888960.

The previous prime is 243287221716631. The next prime is 243287221716677. The reversal of 243287221716651 is 156617122782342.

It is not a de Polignac number, because 243287221716651 - 2⁶ = 243287221716587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243287221716591 and 243287221716600.

It is not an unprimeable number, because it can be changed into a prime (243287221716631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80706796 + ... + 83666966.

It is an arithmetic number, because the mean of its divisors is an integer number (11598841947600).

Almost surely, 2^{243287221716651} is an apocalyptic number.

243287221716651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

243287221716651 is a deficient number, since it is larger than the sum of its proper divisors (127875720606549).

243287221716651 is a wasteful number, since it uses less digits than its factorization.

243287221716651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964819.

The product of its digits is 13547520, while the sum is 57.

The spelling of 243287221716651 in words is "two hundred forty-three trillion, two hundred eighty-seven billion, two hundred twenty-one million, seven hundred sixteen thousand, six hundred fifty-one".