545213520 has 60 divisors (see below), whose sum is σ = 1831011156. Its totient is φ = 145390080.

The previous prime is 545213519. The next prime is 545213527. The reversal of 545213520 is 25312545.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 125619264 + 419594256 = 11208^2 + 20484^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545213527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377901 + ... + 379340.

Almost surely, 2^545213520 is an apocalyptic number.

It is an amenable number.

545213520 is an abundant number, since it is smaller than the sum of its proper divisors (1285797636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545213520 is a wasteful number, since it uses less digits than its factorization.

545213520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757260 (or 757251 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 545213520 is about 23349.8077079877. The cubic root of 545213520 is about 816.9375757249.

The spelling of 545213520 in words is "five hundred forty-five million, two hundred thirteen thousand, five hundred twenty".