243245515273 has 2 divisors, whose sum is σ = 243245515274. Its totient is φ = 243245515272.

The previous prime is 243245515267. The next prime is 243245515361. The reversal of 243245515273 is 372515542342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237180688144 + 6064827129 = 487012^2 + 77877^2 .

It is a cyclic number.

It is not a de Polignac number, because 243245515273 - 2²⁵ = 243211960841 is a prime.

It is a super-3 number, since 3×243245515273³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (243245515673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121622757636 + 121622757637.

It is an arithmetic number, because the mean of its divisors is an integer number (121622757637).

Almost surely, 2^243245515273 is an apocalyptic number.

It is an amenable number.

243245515273 is a deficient number, since it is larger than the sum of its proper divisors (1).

243245515273 is an equidigital number, since it uses as much as digits as its factorization.

243245515273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 43.

The spelling of 243245515273 in words is "two hundred forty-three billion, two hundred forty-five million, five hundred fifteen thousand, two hundred seventy-three".