545507217 has 40 divisors (see below), whose sum is σ = 857260800. Its totient is φ = 345215520.

The previous prime is 545507213. The next prime is 545507219. The reversal of 545507217 is 712705545.

It is not a de Polignac number, because 545507217 - 2² = 545507213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545507213) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 131034 + ... + 135132.

It is an arithmetic number, because the mean of its divisors is an integer number (21431520).

Almost surely, 2^545507217 is an apocalyptic number.

It is an amenable number.

545507217 is a deficient number, since it is larger than the sum of its proper divisors (311753583).

545507217 is a wasteful number, since it uses less digits than its factorization.

545507217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195 (or 4186 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 36.

The square root of 545507217 is about 23356.0959280441. The cubic root of 545507217 is about 817.0842393939.

The spelling of 545507217 in words is "five hundred forty-five million, five hundred seven thousand, two hundred seventeen".