542126552221 has 2 divisors, whose sum is σ = 542126552222. Its totient is φ = 542126552220.

The previous prime is 542126552167. The next prime is 542126552237. The reversal of 542126552221 is 122255621245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355437746596 + 186688805625 = 596186^2 + 432075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542126552221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542126552291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271063276110 + 271063276111.

It is an arithmetic number, because the mean of its divisors is an integer number (271063276111).

Almost surely, 2^542126552221 is an apocalyptic number.

It is an amenable number.

542126552221 is a deficient number, since it is larger than the sum of its proper divisors (1).

542126552221 is an equidigital number, since it uses as much as digits as its factorization.

542126552221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96000, while the sum is 37.

The spelling of 542126552221 in words is "five hundred forty-two billion, one hundred twenty-six million, five hundred fifty-two thousand, two hundred twenty-one".