243155055529 has 2 divisors, whose sum is σ = 243155055530. Its totient is φ = 243155055528.

The previous prime is 243155055487. The next prime is 243155055553. The reversal of 243155055529 is 925550551342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181435106304 + 61719949225 = 425952^2 + 248435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243155055529 is a prime.

It is a super-2 number, since 2×243155055529² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243155050529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121577527764 + 121577527765.

It is an arithmetic number, because the mean of its divisors is an integer number (121577527765).

Almost surely, 2^243155055529 is an apocalyptic number.

It is an amenable number.

243155055529 is a deficient number, since it is larger than the sum of its proper divisors (1).

243155055529 is an equidigital number, since it uses as much as digits as its factorization.

243155055529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350000, while the sum is 46.

The spelling of 243155055529 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-five thousand, five hundred twenty-nine".