2866813221 has 16 divisors (see below), whose sum is σ = 3878402688. Its totient is φ = 1883246400.

The previous prime is 2866813211. The next prime is 2866813223. The reversal of 2866813221 is 1223186682.

It is not a de Polignac number, because 2866813221 - 2⁷ = 2866813093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2866813221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2866813223) 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, 649795 + ... + 654191.

It is an arithmetic number, because the mean of its divisors is an integer number (242400168).

Almost surely, 2^2866813221 is an apocalyptic number.

It is an amenable number.

2866813221 is a deficient number, since it is larger than the sum of its proper divisors (1011589467).

2866813221 is a wasteful number, since it uses less digits than its factorization.

2866813221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7532.

The product of its digits is 55296, while the sum is 39.

The square root of 2866813221 is about 53542.6299410106. The cubic root of 2866813221 is about 1420.5825192195.

The spelling of 2866813221 in words is "two billion, eight hundred sixty-six million, eight hundred thirteen thousand, two hundred twenty-one".