243055453541 has 2 divisors, whose sum is σ = 243055453542. Its totient is φ = 243055453540.

The previous prime is 243055453519. The next prime is 243055453561. The reversal of 243055453541 is 145354550342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196767652225 + 46287801316 = 443585^2 + 215146^2 .

It is a cyclic number.

It is not a de Polignac number, because 243055453541 - 2²² = 243051259237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243055453561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121527726770 + 121527726771.

It is an arithmetic number, because the mean of its divisors is an integer number (121527726771).

Almost surely, 2^243055453541 is an apocalyptic number.

It is an amenable number.

243055453541 is a deficient number, since it is larger than the sum of its proper divisors (1).

243055453541 is an equidigital number, since it uses as much as digits as its factorization.

243055453541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 243055453541 in words is "two hundred forty-three billion, fifty-five million, four hundred fifty-three thousand, five hundred forty-one".