548305813 has 12 divisors (see below), whose sum is σ = 623469420. Its totient is φ = 481268480.

The previous prime is 548305783. The next prime is 548305853. The reversal of 548305813 is 318503845.

It can be written as a sum of positive squares in 2 ways, for example, as 137757169 + 410548644 = 11737^2 + 20262^2 .

It is not a de Polignac number, because 548305813 - 2²⁹ = 11434901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (548305853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74620 + ... + 81637.

It is an arithmetic number, because the mean of its divisors is an integer number (51955785).

Almost surely, 2^548305813 is an apocalyptic number.

It is an amenable number.

548305813 is a deficient number, since it is larger than the sum of its proper divisors (75163607).

548305813 is a wasteful number, since it uses less digits than its factorization.

548305813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156308 (or 156297 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 548305813 is about 23415.9307523745. The cubic root of 548305813 is about 818.4791426335.

The spelling of 548305813 in words is "five hundred forty-eight million, three hundred five thousand, eight hundred thirteen".