818204481 has 12 divisors (see below), whose sum is σ = 1182270180. Its totient is φ = 545276160.

The previous prime is 818204479. The next prime is 818204503. The reversal of 818204481 is 184402818.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61074225 + 757130256 = 7815^2 + 27516^2 .

It is not a de Polignac number, because 818204481 - 2¹ = 818204479 is a prime.

It is a super-2 number, since 2×818204481² = 1338917145456958722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (818204281) 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 11 ways as a sum of consecutive naturals, for example, 13525 + ... + 42653.

It is an arithmetic number, because the mean of its divisors is an integer number (98522515).

Almost surely, 2^818204481 is an apocalyptic number.

It is an amenable number.

818204481 is a deficient number, since it is larger than the sum of its proper divisors (364065699).

818204481 is a wasteful number, since it uses less digits than its factorization.

818204481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32256 (or 32253 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 818204481 is about 28604.2738240285. The cubic root of 818204481 is about 935.3064971710.

The spelling of 818204481 in words is "eight hundred eighteen million, two hundred four thousand, four hundred eighty-one".