243155323 has 2 divisors, whose sum is σ = 243155324. Its totient is φ = 243155322.

The previous prime is 243155317. The next prime is 243155371. The reversal of 243155323 is 323551342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243155323 - 2¹³ = 243147131 is a prime.

It is a super-2 number, since 2×243155323² = 118249022206468658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243155291 and 243155300.

It is not a weakly prime, because it can be changed into another prime (243255323) 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 as a sum of consecutive naturals, namely, 121577661 + 121577662.

It is an arithmetic number, because the mean of its divisors is an integer number (121577662).

Almost surely, 2^243155323 is an apocalyptic number.

243155323 is a deficient number, since it is larger than the sum of its proper divisors (1).

243155323 is an equidigital number, since it uses as much as digits as its factorization.

243155323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 28.

The square root of 243155323 is about 15593.4384598138. The cubic root of 243155323 is about 624.1580753298.

The spelling of 243155323 in words is "two hundred forty-three million, one hundred fifty-five thousand, three hundred twenty-three".