283216861 has 4 divisors (see below), whose sum is σ = 283423324. Its totient is φ = 283010400.

The previous prime is 283216823. The next prime is 283216867. The reversal of 283216861 is 168612382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192376900 + 90839961 = 13870^2 + 9531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-283216861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 283216861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283216867) 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, 101160 + ... + 103921.

It is an arithmetic number, because the mean of its divisors is an integer number (70855831).

Almost surely, 2^283216861 is an apocalyptic number.

It is an amenable number.

283216861 is a deficient number, since it is larger than the sum of its proper divisors (206463).

283216861 is a wasteful number, since it uses less digits than its factorization.

283216861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206462.

The product of its digits is 27648, while the sum is 37.

The square root of 283216861 is about 16829.0481311333. The cubic root of 283216861 is about 656.7091010167.

The spelling of 283216861 in words is "two hundred eighty-three million, two hundred sixteen thousand, eight hundred sixty-one".