542609181 has 12 divisors (see below), whose sum is σ = 804952252. Its totient is φ = 351962496.

The previous prime is 542609159. The next prime is 542609183. The reversal of 542609181 is 181906245.

542609181 is a `hidden beast` number, since 5 + 42 + 609 + 1 + 8 + 1 = 666.

542609181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 453306681 + 89302500 = 21291^2 + 9450^2 .

It is not a de Polignac number, because 542609181 - 2⁵ = 542609149 is a prime.

It is a super-2 number, since 2×542609181² = 588849446610981522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542609183) 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, 814396 + ... + 815061.

Almost surely, 2^542609181 is an apocalyptic number.

It is an amenable number.

542609181 is a deficient number, since it is larger than the sum of its proper divisors (262343071).

542609181 is a wasteful number, since it uses less digits than its factorization.

542609181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629500 (or 1629497 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 542609181 is about 23293.9730617171. The cubic root of 542609181 is about 815.6347350580.

The spelling of 542609181 in words is "five hundred forty-two million, six hundred nine thousand, one hundred eighty-one".