545120243 has 2 divisors, whose sum is σ = 545120244. Its totient is φ = 545120242.

The previous prime is 545120239. The next prime is 545120267. The reversal of 545120243 is 342021545.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545120243 - 2² = 545120239 is a prime.

It is not a weakly prime, because it can be changed into another prime (545122243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272560121 + 272560122.

It is an arithmetic number, because the mean of its divisors is an integer number (272560122).

Almost surely, 2^545120243 is an apocalyptic number.

545120243 is a deficient number, since it is larger than the sum of its proper divisors (1).

545120243 is an equidigital number, since it uses as much as digits as its factorization.

545120243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 545120243 is about 23347.8102399347. The cubic root of 545120243 is about 816.8909849066.

Adding to 545120243 its reverse (342021545), we get a palindrome (887141788).

The spelling of 545120243 in words is "five hundred forty-five million, one hundred twenty thousand, two hundred forty-three".