220887 has 16 divisors (see below), whose sum is σ = 334560. Its totient is φ = 145800.

The previous prime is 220879. The next prime is 220889. The reversal of 220887 is 788022.

220887 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 220887 - 2³ = 220879 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 220887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220889) 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, 2137 + ... + 2237.

It is an arithmetic number, because the mean of its divisors is an integer number (20910).

2²²⁰⁸⁸⁷ is an apocalyptic number.

220887 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

220887 is a deficient number, since it is larger than the sum of its proper divisors (113673).

220887 is an frugal number, since it uses more digits than its factorization.

220887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 220887 is about 469.9861700093. The cubic root of 220887 is about 60.4491296539.

The spelling of 220887 in words is "two hundred twenty thousand, eight hundred eighty-seven".