243584881 has 8 divisors (see below), whose sum is σ = 254335104. Its totient is φ = 232848000.

The previous prime is 243584849. The next prime is 243584893. The reversal of 243584881 is 188485342.

It is a happy number.

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

It is a 3-Lehmer number, since φ(243584881) divides (243584881-1)³.

It is a cyclic number.

It is not a de Polignac number, because 243584881 - 2⁵ = 243584849 is a prime.

It is a super-2 number, since 2×243584881² = 118667188503568322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243584821) 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, 58881 + ... + 62881.

It is an arithmetic number, because the mean of its divisors is an integer number (31791888).

Almost surely, 2^243584881 is an apocalyptic number.

It is an amenable number.

243584881 is a deficient number, since it is larger than the sum of its proper divisors (10750223).

243584881 is a wasteful number, since it uses less digits than its factorization.

243584881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671.

The product of its digits is 245760, while the sum is 43.

The square root of 243584881 is about 15607.2060600224. The cubic root of 243584881 is about 624.5254048263.

The spelling of 243584881 in words is "two hundred forty-three million, five hundred eighty-four thousand, eight hundred eighty-one".