545330243 has 4 divisors (see below), whose sum is σ = 545699448. Its totient is φ = 544961040.

The previous prime is 545330183. The next prime is 545330273. The reversal of 545330243 is 342033545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 545330243 - 2¹⁰ = 545329219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545330273) 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, 182378 + ... + 185343.

It is an arithmetic number, because the mean of its divisors is an integer number (136424862).

Almost surely, 2^545330243 is an apocalyptic number.

545330243 is a deficient number, since it is larger than the sum of its proper divisors (369205).

545330243 is a wasteful number, since it uses less digits than its factorization.

545330243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369204.

The product of its (nonzero) digits is 21600, while the sum is 29.

The square root of 545330243 is about 23352.3070166526. The cubic root of 545330243 is about 816.9958700734.

Adding to 545330243 its reverse (342033545), we get a palindrome (887363788).

The spelling of 545330243 in words is "five hundred forty-five million, three hundred thirty thousand, two hundred forty-three".