243044015573 has 2 divisors, whose sum is σ = 243044015574. Its totient is φ = 243044015572.

The previous prime is 243044015537. The next prime is 243044015597. The reversal of 243044015573 is 375510440342.

Together with previous prime (243044015537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189866733169 + 53177282404 = 435737^2 + 230602^2 .

It is a cyclic number.

It is not a de Polignac number, because 243044015573 - 2²⁴ = 243027238357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243044915573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121522007786 + 121522007787.

It is an arithmetic number, because the mean of its divisors is an integer number (121522007787).

Almost surely, 2^243044015573 is an apocalyptic number.

It is an amenable number.

243044015573 is a deficient number, since it is larger than the sum of its proper divisors (1).

243044015573 is an equidigital number, since it uses as much as digits as its factorization.

243044015573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 38.

The spelling of 243044015573 in words is "two hundred forty-three billion, forty-four million, fifteen thousand, five hundred seventy-three".