808222221 has 6 divisors (see below), whose sum is σ = 1167432110. Its totient is φ = 538814808.

The previous prime is 808222193. The next prime is 808222241. The reversal of 808222221 is 122222808.

It can be written as a sum of positive squares in only one way, i.e., 599564196 + 208658025 = 24486^2 + 14445^2 .

It is a de Polignac number, because none of the positive numbers 2^k-808222221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808222241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44901226 + ... + 44901243.

Almost surely, 2^808222221 is an apocalyptic number.

It is an amenable number.

808222221 is a deficient number, since it is larger than the sum of its proper divisors (359209889).

808222221 is a wasteful number, since it uses less digits than its factorization.

808222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89802475 (or 89802472 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 808222221 is about 28429.2493921313. The cubic root of 808222221 is about 931.4872803108.

It can be divided in two parts, 8082 and 22221, that added together give a palindrome (30303).

The spelling of 808222221 in words is "eight hundred eight million, two hundred twenty-two thousand, two hundred twenty-one".