545617217 has 4 divisors (see below), whose sum is σ = 558924996. Its totient is φ = 532309440.

The previous prime is 545617211. The next prime is 545617231. The reversal of 545617217 is 712716545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712716545 = 5 ⋅142543309.

It can be written as a sum of positive squares in 2 ways, for example, as 206468161 + 339149056 = 14369^2 + 18416^2 .

It is a cyclic number.

It is not a de Polignac number, because 545617217 - 2⁸ = 545616961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545617211) 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, 6653828 + ... + 6653909.

It is an arithmetic number, because the mean of its divisors is an integer number (139731249).

Almost surely, 2^545617217 is an apocalyptic number.

It is an amenable number.

545617217 is a deficient number, since it is larger than the sum of its proper divisors (13307779).

545617217 is a wasteful number, since it uses less digits than its factorization.

545617217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13307778.

The product of its digits is 58800, while the sum is 38.

The square root of 545617217 is about 23358.4506549557. The cubic root of 545617217 is about 817.1391566177.

The spelling of 545617217 in words is "five hundred forty-five million, six hundred seventeen thousand, two hundred seventeen".