243513879231 has 8 divisors (see below), whose sum is σ = 371068768384. Its totient is φ = 139150788120.

The previous prime is 243513879209. The next prime is 243513879233. The reversal of 243513879231 is 132978315342.

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

It is not a de Polignac number, because 243513879231 - 2¹⁵ = 243513846463 is a prime.

It is a super-2 number, since 2×243513879231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243513879233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5797949485 + ... + 5797949526.

It is an arithmetic number, because the mean of its divisors is an integer number (46383596048).

Almost surely, 2^243513879231 is an apocalyptic number.

243513879231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

243513879231 is a deficient number, since it is larger than the sum of its proper divisors (127554889153).

243513879231 is a wasteful number, since it uses less digits than its factorization.

243513879231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11595899021.

The product of its digits is 1088640, while the sum is 48.

The spelling of 243513879231 in words is "two hundred forty-three billion, five hundred thirteen million, eight hundred seventy-nine thousand, two hundred thirty-one".