285305222 has 8 divisors (see below), whose sum is σ = 428934000. Its totient is φ = 142327224.

The previous prime is 285305221. The next prime is 285305233. The reversal of 285305222 is 222503582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285305221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161597 + ... + 163352.

It is an arithmetic number, because the mean of its divisors is an integer number (53616750).

Almost surely, 2^285305222 is an apocalyptic number.

285305222 is a deficient number, since it is larger than the sum of its proper divisors (143628778).

285305222 is a wasteful number, since it uses less digits than its factorization.

285305222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325390.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 285305222 is about 16890.9804925587. The cubic root of 285305222 is about 658.3192788468.

The spelling of 285305222 in words is "two hundred eighty-five million, three hundred five thousand, two hundred twenty-two".