545220445 has 64 divisors (see below), whose sum is σ = 862617600. Its totient is φ = 320866560.

The previous prime is 545220439. The next prime is 545220449. The reversal of 545220445 is 544022545.

It is not a de Polignac number, because 545220445 - 2¹⁷ = 545089373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545220449) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 524236 + ... + 525274.

It is an arithmetic number, because the mean of its divisors is an integer number (13478400).

Almost surely, 2^545220445 is an apocalyptic number.

545220445 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

545220445 is a deficient number, since it is larger than the sum of its proper divisors (317397155).

545220445 is a wasteful number, since it uses less digits than its factorization.

545220445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 32000, while the sum is 31.

The square root of 545220445 is about 23349.9559956759. The cubic root of 545220445 is about 816.9410344731.

The spelling of 545220445 in words is "five hundred forty-five million, two hundred twenty thousand, four hundred forty-five".