243148133 has 2 divisors, whose sum is σ = 243148134. Its totient is φ = 243148132.

The previous prime is 243148121. The next prime is 243148141. The reversal of 243148133 is 331841342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145395364 + 97752769 = 12058^2 + 9887^2 .

It is a cyclic number.

It is not a de Polignac number, because 243148133 - 2⁴ = 243148117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243148096 and 243148105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243148733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121574066 + 121574067.

It is an arithmetic number, because the mean of its divisors is an integer number (121574067).

Almost surely, 2^243148133 is an apocalyptic number.

It is an amenable number.

243148133 is a deficient number, since it is larger than the sum of its proper divisors (1).

243148133 is an equidigital number, since it uses as much as digits as its factorization.

243148133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 243148133 is about 15593.2079124214. The cubic root of 243148133 is about 624.1519232391.

Adding to 243148133 its reverse (331841342), we get a palindrome (574989475).

The spelling of 243148133 in words is "two hundred forty-three million, one hundred forty-eight thousand, one hundred thirty-three".