243133145 has 8 divisors (see below), whose sum is σ = 295275456. Its totient is φ = 192162736.

The previous prime is 243133097. The next prime is 243133147. The reversal of 243133145 is 541331342.

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 243133145 - 2¹² = 243129049 is a prime.

It is a super-2 number, since 2×243133145² = 118227452395182050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243133147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292517 + ... + 293346.

It is an arithmetic number, because the mean of its divisors is an integer number (36909432).

Almost surely, 2^243133145 is an apocalyptic number.

It is an amenable number.

243133145 is a deficient number, since it is larger than the sum of its proper divisors (52142311).

243133145 is an equidigital number, since it uses as much as digits as its factorization.

243133145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585951.

The product of its digits is 4320, while the sum is 26.

The square root of 243133145 is about 15592.7273111537. The cubic root of 243133145 is about 624.1390984354.

Adding to 243133145 its reverse (541331342), we get a palindrome (784464487).

The spelling of 243133145 in words is "two hundred forty-three million, one hundred thirty-three thousand, one hundred forty-five".