542517281 has 2 divisors, whose sum is σ = 542517282. Its totient is φ = 542517280.

The previous prime is 542517233. The next prime is 542517293. The reversal of 542517281 is 182715245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477859600 + 64657681 = 21860^2 + 8041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542517281 is a prime.

It is a super-2 number, since 2×542517281² = 588650000367265922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (542517221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271258640 + 271258641.

It is an arithmetic number, because the mean of its divisors is an integer number (271258641).

Almost surely, 2^542517281 is an apocalyptic number.

It is an amenable number.

542517281 is a deficient number, since it is larger than the sum of its proper divisors (1).

542517281 is an equidigital number, since it uses as much as digits as its factorization.

542517281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 35.

The square root of 542517281 is about 23292.0003649322. Note that the first 3 decimals coincide. The cubic root of 542517281 is about 815.5886853001.

The spelling of 542517281 in words is "five hundred forty-two million, five hundred seventeen thousand, two hundred eighty-one".