285222216557 has 2 divisors, whose sum is σ = 285222216558. Its totient is φ = 285222216556.

The previous prime is 285222216527. The next prime is 285222216577. The reversal of 285222216557 is 755612222582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162095617321 + 123126599236 = 402611^2 + 350894^2 .

It is a cyclic number.

It is not a de Polignac number, because 285222216557 - 2³⁶ = 216502739821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285222216527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142611108278 + 142611108279.

It is an arithmetic number, because the mean of its divisors is an integer number (142611108279).

Almost surely, 2^285222216557 is an apocalyptic number.

It is an amenable number.

285222216557 is a deficient number, since it is larger than the sum of its proper divisors (1).

285222216557 is an equidigital number, since it uses as much as digits as its factorization.

285222216557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344000, while the sum is 47.

The spelling of 285222216557 in words is "two hundred eighty-five billion, two hundred twenty-two million, two hundred sixteen thousand, five hundred fifty-seven".