284055885221 has 2 divisors, whose sum is σ = 284055885222. Its totient is φ = 284055885220.

The previous prime is 284055885173. The next prime is 284055885227. The reversal of 284055885221 is 122588550482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152061002500 + 131994882721 = 389950^2 + 363311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284055885221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 284055885221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284055885227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142027942610 + 142027942611.

It is an arithmetic number, because the mean of its divisors is an integer number (142027942611).

Almost surely, 2^284055885221 is an apocalyptic number.

It is an amenable number.

284055885221 is a deficient number, since it is larger than the sum of its proper divisors (1).

284055885221 is an equidigital number, since it uses as much as digits as its factorization.

284055885221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048000, while the sum is 50.

The spelling of 284055885221 in words is "two hundred eighty-four billion, fifty-five million, eight hundred eighty-five thousand, two hundred twenty-one".