243201022509 has 8 divisors (see below), whose sum is σ = 325897518400. Its totient is φ = 161319270816.

The previous prime is 243201022501. The next prime is 243201022541. The reversal of 243201022509 is 905220102342.

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

It is not a de Polignac number, because 243201022509 - 2³ = 243201022501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243201022501) 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, 203685352 + ... + 203686545.

It is an arithmetic number, because the mean of its divisors is an integer number (40737189800).

Almost surely, 2^243201022509 is an apocalyptic number.

It is an amenable number.

243201022509 is a deficient number, since it is larger than the sum of its proper divisors (82696495891).

243201022509 is a wasteful number, since it uses less digits than its factorization.

243201022509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407372099.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 243201022509 in words is "two hundred forty-three billion, two hundred one million, twenty-two thousand, five hundred nine".