243217650081 has 32 divisors (see below), whose sum is σ = 392452577280. Its totient is φ = 130794736896.

The previous prime is 243217650079. The next prime is 243217650121. The reversal of 243217650081 is 180056712342.

It is not a de Polignac number, because 243217650081 - 2¹ = 243217650079 is a prime.

It is a super-2 number, since 2×243217650081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243217651081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5532670 + ... + 5576456.

It is an arithmetic number, because the mean of its divisors is an integer number (12264143040).

Almost surely, 2^243217650081 is an apocalyptic number.

243217650081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243217650081 is a deficient number, since it is larger than the sum of its proper divisors (149234927199).

243217650081 is a wasteful number, since it uses less digits than its factorization.

243217650081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59373.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 243217650081 in words is "two hundred forty-three billion, two hundred seventeen million, six hundred fifty thousand, eighty-one".