542508205 has 4 divisors (see below), whose sum is σ = 651009852. Its totient is φ = 434006560.

The previous prime is 542508203. The next prime is 542508217. The reversal of 542508205 is 502805245.

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 146458404 + 396049801 = 12102^2 + 19901^2 .

It is not a de Polignac number, because 542508205 - 2¹ = 542508203 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542508203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54250816 + ... + 54250825.

It is an arithmetic number, because the mean of its divisors is an integer number (162752463).

Almost surely, 2^542508205 is an apocalyptic number.

It is an amenable number.

542508205 is a deficient number, since it is larger than the sum of its proper divisors (108501647).

542508205 is a wasteful number, since it uses less digits than its factorization.

542508205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108501646.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 542508205 is about 23291.8055332771. The cubic root of 542508205 is about 815.5841371659.

The spelling of 542508205 in words is "five hundred forty-two million, five hundred eight thousand, two hundred five".