243921801 has 8 divisors (see below), whose sum is σ = 328269024. Its totient is φ = 161094560.

The previous prime is 243921793. The next prime is 243921809. The reversal of 243921801 is 108129342.

It is an interprime number because it is at equal distance from previous prime (243921793) and next prime (243921809).

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 243921801 - 2³ = 243921793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243921809) 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, 379620 + ... + 380261.

It is an arithmetic number, because the mean of its divisors is an integer number (41033628).

Almost surely, 2^243921801 is an apocalyptic number.

It is an amenable number.

243921801 is a deficient number, since it is larger than the sum of its proper divisors (84347223).

243921801 is a wasteful number, since it uses less digits than its factorization.

243921801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759991.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 243921801 is about 15617.9960622354. The cubic root of 243921801 is about 624.8132143700.

The spelling of 243921801 in words is "two hundred forty-three million, nine hundred twenty-one thousand, eight hundred one".