545918217 has 16 divisors (see below), whose sum is σ = 784445760. Its totient is φ = 335708352.

The previous prime is 545918213. The next prime is 545918221. The reversal of 545918217 is 712819545.

It is an interprime number because it is at equal distance from previous prime (545918213) and next prime (545918221).

It is not a de Polignac number, because 545918217 - 2² = 545918213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545918213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60898 + ... + 69284.

It is an arithmetic number, because the mean of its divisors is an integer number (49027860).

Almost surely, 2^545918217 is an apocalyptic number.

It is an amenable number.

545918217 is a deficient number, since it is larger than the sum of its proper divisors (238527543).

545918217 is a wasteful number, since it uses less digits than its factorization.

545918217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10072.

The product of its digits is 100800, while the sum is 42.

The square root of 545918217 is about 23364.8928309119. The cubic root of 545918217 is about 817.2893923893.

The spelling of 545918217 in words is "five hundred forty-five million, nine hundred eighteen thousand, two hundred seventeen".