283115220221 has 4 divisors (see below), whose sum is σ = 283116318012. Its totient is φ = 283114122432.

The previous prime is 283115220203. The next prime is 283115220247. The reversal of 283115220221 is 122022511382.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122022511382 = 2 ⋅61011255691.

It can be written as a sum of positive squares in 2 ways, for example, as 185528332900 + 97586887321 = 430730^2 + 312389^2 .

It is a cyclic number.

It is not a de Polignac number, because 283115220221 - 2³⁸ = 8237313277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283015220221) 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, 72251 + ... + 755943.

It is an arithmetic number, because the mean of its divisors is an integer number (70779079503).

Almost surely, 2^283115220221 is an apocalyptic number.

It is an amenable number.

283115220221 is a deficient number, since it is larger than the sum of its proper divisors (1097791).

283115220221 is an equidigital number, since it uses as much as digits as its factorization.

283115220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097790.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 283115220221 in words is "two hundred eighty-three billion, one hundred fifteen million, two hundred twenty thousand, two hundred twenty-one".