243215050625721 has 12 divisors (see below), whose sum is σ = 353992389207600. Its totient is φ = 160905631456440.

The previous prime is 243215050625711. The next prime is 243215050625759. The reversal of 243215050625721 is 127526050512342.

It is a happy number.

243215050625721 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 1 + 50 + 506 + 25 + 72 + 1 = 666.

It is not a de Polignac number, because 243215050625721 - 2⁵ = 243215050625689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243215050625711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103144634371 + ... + 103144636728.

It is an arithmetic number, because the mean of its divisors is an integer number (29499365767300).

Almost surely, 2^{243215050625721} is an apocalyptic number.

It is an amenable number.

243215050625721 is a deficient number, since it is larger than the sum of its proper divisors (110777338581879).

243215050625721 is a wasteful number, since it uses less digits than its factorization.

243215050625721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206289271236 (or 206289271233 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The spelling of 243215050625721 in words is "two hundred forty-three trillion, two hundred fifteen billion, fifty million, six hundred twenty-five thousand, seven hundred twenty-one".