54198830221 has 2 divisors, whose sum is σ = 54198830222. Its totient is φ = 54198830220.

The previous prime is 54198830207. The next prime is 54198830227. The reversal of 54198830221 is 12203889145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51624384100 + 2574446121 = 227210^2 + 50739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54198830221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54198830227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27099415110 + 27099415111.

It is an arithmetic number, because the mean of its divisors is an integer number (27099415111).

Almost surely, 2^54198830221 is an apocalyptic number.

It is an amenable number.

54198830221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54198830221 is an equidigital number, since it uses as much as digits as its factorization.

54198830221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 54198830221 in words is "fifty-four billion, one hundred ninety-eight million, eight hundred thirty thousand, two hundred twenty-one".