542820305 has 4 divisors (see below), whose sum is σ = 651384372. Its totient is φ = 434256240.

The previous prime is 542820283. The next prime is 542820331. The reversal of 542820305 is 503028245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220581904 + 322238401 = 14852^2 + 17951^2 .

It is not a de Polignac number, because 542820305 - 2⁶ = 542820241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54282026 + ... + 54282035.

It is an arithmetic number, because the mean of its divisors is an integer number (162846093).

Almost surely, 2^542820305 is an apocalyptic number.

It is an amenable number.

542820305 is a deficient number, since it is larger than the sum of its proper divisors (108564067).

542820305 is a wasteful number, since it uses less digits than its factorization.

542820305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108564066.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 542820305 is about 23298.5043511381. The cubic root of 542820305 is about 815.7405065444.

The spelling of 542820305 in words is "five hundred forty-two million, eight hundred twenty thousand, three hundred five".