545221605 has 32 divisors (see below), whose sum is σ = 913368960. Its totient is φ = 277356800.

The previous prime is 545221591. The next prime is 545221613. The reversal of 545221605 is 506122545.

It is not a de Polignac number, because 545221605 - 2¹⁰ = 545220581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28555 + ... + 43655.

It is an arithmetic number, because the mean of its divisors is an integer number (28542780).

Almost surely, 2^545221605 is an apocalyptic number.

It is an amenable number.

545221605 is a deficient number, since it is larger than the sum of its proper divisors (368147355).

545221605 is a wasteful number, since it uses less digits than its factorization.

545221605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15221.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 545221605 is about 23349.9808351099. The cubic root of 545221605 is about 816.9416138418.

The spelling of 545221605 in words is "five hundred forty-five million, two hundred twenty-one thousand, six hundred five".