286942221 has 12 divisors (see below), whose sum is σ = 418347072. Its totient is φ = 189506376.

The previous prime is 286942219. The next prime is 286942223. The reversal of 286942221 is 122249682.

It is an interprime number because it is at equal distance from previous prime (286942219) and next prime (286942223).

It is not a de Polignac number, because 286942221 - 2¹ = 286942219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286942223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148021 + ... + 149946.

It is an arithmetic number, because the mean of its divisors is an integer number (34862256).

Almost surely, 2^286942221 is an apocalyptic number.

It is an amenable number.

286942221 is a deficient number, since it is larger than the sum of its proper divisors (131404851).

286942221 is a wasteful number, since it uses less digits than its factorization.

286942221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298080 (or 298077 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 286942221 is about 16939.3689669952. The cubic root of 286942221 is about 659.5759604020.

The spelling of 286942221 in words is "two hundred eighty-six million, nine hundred forty-two thousand, two hundred twenty-one".