542500005209 has 2 divisors, whose sum is σ = 542500005210. Its totient is φ = 542500005208.

The previous prime is 542500005197. The next prime is 542500005259. The reversal of 542500005209 is 902500005245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502681000000 + 39819005209 = 709000^2 + 199547^2 .

It is a cyclic number.

It is not a de Polignac number, because 542500005209 - 2⁸ = 542500004953 is a prime.

It is not a weakly prime, because it can be changed into another prime (542500005259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271250002604 + 271250002605.

It is an arithmetic number, because the mean of its divisors is an integer number (271250002605).

Almost surely, 2^542500005209 is an apocalyptic number.

It is an amenable number.

542500005209 is a deficient number, since it is larger than the sum of its proper divisors (1).

542500005209 is an equidigital number, since it uses as much as digits as its factorization.

542500005209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 542500005209 in words is "five hundred forty-two billion, five hundred million, five thousand, two hundred nine".