542216987281 has 2 divisors, whose sum is σ = 542216987282. Its totient is φ = 542216987280.

The previous prime is 542216987251. The next prime is 542216987309. The reversal of 542216987281 is 182789612245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312526839681 + 229690147600 = 559041^2 + 479260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542216987281 is a prime.

It is a super-2 number, since 2×542216987281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (542216987251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271108493640 + 271108493641.

It is an arithmetic number, because the mean of its divisors is an integer number (271108493641).

Almost surely, 2^542216987281 is an apocalyptic number.

It is an amenable number.

542216987281 is a deficient number, since it is larger than the sum of its proper divisors (1).

542216987281 is an equidigital number, since it uses as much as digits as its factorization.

542216987281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The spelling of 542216987281 in words is "five hundred forty-two billion, two hundred sixteen million, nine hundred eighty-seven thousand, two hundred eighty-one".