243279881 has 8 divisors (see below), whose sum is σ = 265905024. Its totient is φ = 221213520.

The previous prime is 243279859. The next prime is 243279893. The reversal of 243279881 is 188972342.

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

It is a cyclic number.

It is not a de Polignac number, because 243279881 - 2¹⁴ = 243263497 is a prime.

It is a super-2 number, since 2×243279881² = 118370200998748322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243279851) 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, 138785 + ... + 140526.

It is an arithmetic number, because the mean of its divisors is an integer number (33238128).

Almost surely, 2^243279881 is an apocalyptic number.

It is an amenable number.

243279881 is a deficient number, since it is larger than the sum of its proper divisors (22625143).

243279881 is a wasteful number, since it uses less digits than its factorization.

243279881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279391.

The product of its digits is 193536, while the sum is 44.

The square root of 243279881 is about 15597.4318719461. The cubic root of 243279881 is about 624.2646335706.

The spelling of 243279881 in words is "two hundred forty-three million, two hundred seventy-nine thousand, eight hundred eighty-one".