243133001 has 4 divisors (see below), whose sum is σ = 243210000. Its totient is φ = 243056004.

The previous prime is 243132983. The next prime is 243133003. The reversal of 243133001 is 100331342.

It is a happy number.

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 243133001 - 2¹⁴ = 243116617 is a prime.

It is a super-2 number, since 2×243133001² = 118227312350532002, 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 (243133003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33551 + ... + 40148.

It is an arithmetic number, because the mean of its divisors is an integer number (60802500).

Almost surely, 2^243133001 is an apocalyptic number.

It is an amenable number.

243133001 is a deficient number, since it is larger than the sum of its proper divisors (76999).

243133001 is an equidigital number, since it uses as much as digits as its factorization.

243133001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76998.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 243133001 is about 15592.7226936158. The cubic root of 243133001 is about 624.1389752162.

Adding to 243133001 its reverse (100331342), we get a palindrome (343464343).

The spelling of 243133001 in words is "two hundred forty-three million, one hundred thirty-three thousand, one".