220686851 has 16 divisors (see below), whose sum is σ = 275573760. Its totient is φ = 171694080.

The previous prime is 220686847. The next prime is 220686857. The reversal of 220686851 is 158686022.

It is a cyclic number.

It is not a de Polignac number, because 220686851 - 2² = 220686847 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 57350 + ... + 61076.

It is an arithmetic number, because the mean of its divisors is an integer number (17223360).

Almost surely, 2^220686851 is an apocalyptic number.

220686851 is a deficient number, since it is larger than the sum of its proper divisors (54886909).

220686851 is a wasteful number, since it uses less digits than its factorization.

220686851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 220686851 is about 14855.5326730481. The cubic root of 220686851 is about 604.3086618437.

The spelling of 220686851 in words is "two hundred twenty million, six hundred eighty-six thousand, eight hundred fifty-one".