243521150203161 has 24 divisors (see below), whose sum is σ = 360537495312384. Its totient is φ = 158340928125600.

The previous prime is 243521150203153. The next prime is 243521150203189. The reversal of 243521150203161 is 161302051125342.

243521150203161 is a `hidden beast` number, since 2 + 4 + 3 + 52 + 11 + 502 + 0 + 31 + 61 = 666.

It is not a de Polignac number, because 243521150203161 - 2³ = 243521150203153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243521150203061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1999193241 + ... + 1999315046.

It is an arithmetic number, because the mean of its divisors is an integer number (15022395638016).

Almost surely, 2^{243521150203161} is an apocalyptic number.

It is an amenable number.

243521150203161 is a deficient number, since it is larger than the sum of its proper divisors (117016345109223).

243521150203161 is a wasteful number, since it uses less digits than its factorization.

243521150203161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998508461 (or 3998508458 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 243521150203161 in words is "two hundred forty-three trillion, five hundred twenty-one billion, one hundred fifty million, two hundred three thousand, one hundred sixty-one".