545281273 has 4 divisors (see below), whose sum is σ = 577356660. Its totient is φ = 513205888.

The previous prime is 545281259. The next prime is 545281291. The reversal of 545281273 is 372182545.

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

It can be written as a sum of positive squares in 2 ways, for example, as 466905664 + 78375609 = 21608^2 + 8853^2 .

It is a cyclic number.

It is not a de Polignac number, because 545281273 - 2¹³ = 545273081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545284273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16037668 + ... + 16037701.

It is an arithmetic number, because the mean of its divisors is an integer number (144339165).

Almost surely, 2^545281273 is an apocalyptic number.

It is an amenable number.

545281273 is a deficient number, since it is larger than the sum of its proper divisors (32075387).

545281273 is a wasteful number, since it uses less digits than its factorization.

545281273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32075386.

The product of its digits is 67200, while the sum is 37.

The square root of 545281273 is about 23351.2584885697. The cubic root of 545281273 is about 816.9714142591.

The spelling of 545281273 in words is "five hundred forty-five million, two hundred eighty-one thousand, two hundred seventy-three".