285222863 has 2 divisors, whose sum is σ = 285222864. Its totient is φ = 285222862.

The previous prime is 285222853. The next prime is 285222907. The reversal of 285222863 is 368222582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285222863 is a prime.

It is a Chen prime.

It is equal to p_15494186 and since 285222863 and 15494186 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285222853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142611431 + 142611432.

It is an arithmetic number, because the mean of its divisors is an integer number (142611432).

Almost surely, 2^285222863 is an apocalyptic number.

285222863 is a deficient number, since it is larger than the sum of its proper divisors (1).

285222863 is an equidigital number, since it uses as much as digits as its factorization.

285222863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 38.

The square root of 285222863 is about 16888.5423586525. The cubic root of 285222863 is about 658.2559271201.

The spelling of 285222863 in words is "two hundred eighty-five million, two hundred twenty-two thousand, eight hundred sixty-three".