243306001 has 4 divisors (see below), whose sum is σ = 256111600. Its totient is φ = 230500404.

The previous prime is 243305977. The next prime is 243306047. The reversal of 243306001 is 100603342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243306001 - 2⁷ = 243305873 is a prime.

It is a super-2 number, since 2×243306001² = 118395620245224002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 12805579 = 243306001 / (2 + 4 + 3 + 3 + 0 + 6 + 0 + 0 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243306001.

It is not an unprimeable number, because it can be changed into a prime (243306061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6402771 + ... + 6402808.

It is an arithmetic number, because the mean of its divisors is an integer number (64027900).

Almost surely, 2^243306001 is an apocalyptic number.

It is an amenable number.

243306001 is a deficient number, since it is larger than the sum of its proper divisors (12805599).

243306001 is a wasteful number, since it uses less digits than its factorization.

243306001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805598.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 243306001 is about 15598.2691668018. The cubic root of 243306001 is about 624.2869743805.

Adding to 243306001 its reverse (100603342), we get a palindrome (343909343).

The spelling of 243306001 in words is "two hundred forty-three million, three hundred six thousand, one".