220686853 has 4 divisors (see below), whose sum is σ = 222639948. Its totient is φ = 218733760.

The previous prime is 220686847. The next prime is 220686857. The reversal of 220686853 is 358686022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 358686022 = 2 ⋅179343011.

It can be written as a sum of positive squares in 2 ways, for example, as 78552769 + 142134084 = 8863^2 + 11922^2 .

It is a cyclic number.

It is not a de Polignac number, because 220686853 - 2⁹ = 220686341 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220686857) 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 3 ways as a sum of consecutive naturals, for example, 976378 + ... + 976603.

It is an arithmetic number, because the mean of its divisors is an integer number (55659987).

Almost surely, 2^220686853 is an apocalyptic number.

It is an amenable number.

220686853 is a deficient number, since it is larger than the sum of its proper divisors (1953095).

220686853 is a wasteful number, since it uses less digits than its factorization.

220686853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953094.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 220686853 is about 14855.5327403631. The cubic root of 220686853 is about 604.3086636692.

The spelling of 220686853 in words is "two hundred twenty million, six hundred eighty-six thousand, eight hundred fifty-three".