243142033 has 2 divisors, whose sum is σ = 243142034. Its totient is φ = 243142032.

The previous prime is 243142027. The next prime is 243142079. The reversal of 243142033 is 330241342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218211984 + 24930049 = 14772^2 + 4993^2 .

It is a cyclic number.

It is not a de Polignac number, because 243142033 - 2⁵ = 243142001 is a prime.

It is a super-2 number, since 2×243142033² = 118236096422746178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243141995 and 243142013.

It is not a weakly prime, because it can be changed into another prime (243142433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121571016 + 121571017.

It is an arithmetic number, because the mean of its divisors is an integer number (121571017).

Almost surely, 2^243142033 is an apocalyptic number.

It is an amenable number.

243142033 is a deficient number, since it is larger than the sum of its proper divisors (1).

243142033 is an equidigital number, since it uses as much as digits as its factorization.

243142033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 243142033 is about 15593.0123132126. The cubic root of 243142033 is about 624.1467037069.

Adding to 243142033 its reverse (330241342), we get a palindrome (573383375).

The spelling of 243142033 in words is "two hundred forty-three million, one hundred forty-two thousand, thirty-three".