545552243 has 4 divisors (see below), whose sum is σ = 546508248. Its totient is φ = 544596240.

The previous prime is 545552237. The next prime is 545552261. The reversal of 545552243 is 342255545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342255545 = 5 ⋅68451109.

It is a cyclic number.

It is not a de Polignac number, because 545552243 - 2⁶ = 545552179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545552543) 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, 477146 + ... + 478287.

It is an arithmetic number, because the mean of its divisors is an integer number (136627062).

Almost surely, 2^545552243 is an apocalyptic number.

545552243 is a deficient number, since it is larger than the sum of its proper divisors (956005).

545552243 is an equidigital number, since it uses as much as digits as its factorization.

545552243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956004.

The product of its digits is 120000, while the sum is 35.

The square root of 545552243 is about 23357.0598106868. The cubic root of 545552243 is about 817.1067194038.

The spelling of 545552243 in words is "five hundred forty-five million, five hundred fifty-two thousand, two hundred forty-three".