243135363561 has 8 divisors (see below), whose sum is σ = 324186176160. Its totient is φ = 162087396672.

The previous prime is 243135363547. The next prime is 243135363589. The reversal of 243135363561 is 165363531342.

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

It is not a de Polignac number, because 243135363561 - 2¹⁴ = 243135347177 is a prime.

It is a super-2 number, since 2×243135363561² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243135363461) 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, 503376 + ... + 860033.

It is an arithmetic number, because the mean of its divisors is an integer number (40523272020).

Almost surely, 2^243135363561 is an apocalyptic number.

It is an amenable number.

243135363561 is a deficient number, since it is larger than the sum of its proper divisors (81050812599).

243135363561 is a wasteful number, since it uses less digits than its factorization.

243135363561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422855.

The product of its digits is 583200, while the sum is 42.

The spelling of 243135363561 in words is "two hundred forty-three billion, one hundred thirty-five million, three hundred sixty-three thousand, five hundred sixty-one".