243121530473 has 2 divisors, whose sum is σ = 243121530474. Its totient is φ = 243121530472.

The previous prime is 243121530467. The next prime is 243121530499. The reversal of 243121530473 is 374035121342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242268715264 + 852815209 = 492208^2 + 29203^2 .

It is a cyclic number.

It is not a de Polignac number, because 243121530473 - 2⁶ = 243121530409 is a prime.

It is not a weakly prime, because it can be changed into another prime (243121530973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560765236 + 121560765237.

It is an arithmetic number, because the mean of its divisors is an integer number (121560765237).

Almost surely, 2^243121530473 is an apocalyptic number.

It is an amenable number.

243121530473 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121530473 is an equidigital number, since it uses as much as digits as its factorization.

243121530473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 243121530473 in words is "two hundred forty-three billion, one hundred twenty-one million, five hundred thirty thousand, four hundred seventy-three".