808221745 has 16 divisors (see below), whose sum is σ = 983784960. Its totient is φ = 637326144.

The previous prime is 808221721. The next prime is 808221749. The reversal of 808221745 is 547122808.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808221745 is a prime.

It is not an unprimeable number, because it can be changed into a prime (808221749) 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 15 ways as a sum of consecutive naturals, for example, 304012 + ... + 306658.

It is an arithmetic number, because the mean of its divisors is an integer number (61486560).

Almost surely, 2^808221745 is an apocalyptic number.

It is an amenable number.

808221745 is a deficient number, since it is larger than the sum of its proper divisors (175563215).

808221745 is a wasteful number, since it uses less digits than its factorization.

808221745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 808221745 is about 28429.2410204705. The cubic root of 808221745 is about 931.4870974453.

The spelling of 808221745 in words is "eight hundred eight million, two hundred twenty-one thousand, seven hundred forty-five".