814081221 has 6 divisors (see below), whose sum is σ = 1175895110. Its totient is φ = 542720808.

The previous prime is 814081207. The next prime is 814081223. The reversal of 814081221 is 122180418.

It can be written as a sum of positive squares in only one way, i.e., 776736900 + 37344321 = 27870^2 + 6111^2 .

It is not a de Polignac number, because 814081221 - 2⁵ = 814081189 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 (814081223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45226726 + ... + 45226743.

Almost surely, 2^814081221 is an apocalyptic number.

It is an amenable number.

814081221 is a deficient number, since it is larger than the sum of its proper divisors (361813889).

814081221 is a wasteful number, since it uses less digits than its factorization.

814081221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90453475 (or 90453472 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 814081221 is about 28532.1085971577. The cubic root of 814081221 is about 933.7327225934.

The spelling of 814081221 in words is "eight hundred fourteen million, eighty-one thousand, two hundred twenty-one".