545243243 has 4 divisors (see below), whose sum is σ = 545527248. Its totient is φ = 544959240.

The previous prime is 545243219. The next prime is 545243263. The reversal of 545243243 is 342342545.

545243243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342342545 = 5 ⋅68468509.

It is a cyclic number.

It is not a de Polignac number, because 545243243 - 2¹⁴ = 545226859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545243263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139103 + ... + 142968.

It is an arithmetic number, because the mean of its divisors is an integer number (136381812).

Almost surely, 2^545243243 is an apocalyptic number.

545243243 is a deficient number, since it is larger than the sum of its proper divisors (284005).

545243243 is a wasteful number, since it uses less digits than its factorization.

545243243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284004.

The product of its digits is 57600, while the sum is 32.

The square root of 545243243 is about 23350.4441713643. Note that the first 3 decimals coincide. The cubic root of 545243243 is about 816.9524209146.

Adding to 545243243 its reverse (342342545), we get a palindrome (887585788).

The spelling of 545243243 in words is "five hundred forty-five million, two hundred forty-three thousand, two hundred forty-three".