243542502135321 has 8 divisors (see below), whose sum is σ = 324868496375424. Its totient is φ = 162289087992720.

The previous prime is 243542502135293. The next prime is 243542502135389. The reversal of 243542502135321 is 123531205245342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243542502135321 - 2¹⁰ = 243542502134297 is a prime.

It is a super-3 number, since 3×243542502135321³ (a number of 44 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243542502133321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18145016545 + ... + 18145029966.

It is an arithmetic number, because the mean of its divisors is an integer number (40608562046928).

Almost surely, 2^{243542502135321} is an apocalyptic number.

It is an amenable number.

243542502135321 is a deficient number, since it is larger than the sum of its proper divisors (81325994240103).

243542502135321 is a wasteful number, since it uses less digits than its factorization.

243542502135321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36290048751.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 243542502135321 in words is "two hundred forty-three trillion, five hundred forty-two billion, five hundred two million, one hundred thirty-five thousand, three hundred twenty-one".