220995 has 16 divisors (see below), whose sum is σ = 393120. Its totient is φ = 117792.

The previous prime is 220973. The next prime is 221021. The reversal of 220995 is 599022.

It is not a de Polignac number, because 220995 - 2⁶ = 220931 is a prime.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2²²⁰⁹⁹⁵ is an apocalyptic number.

220995 is a deficient number, since it is larger than the sum of its proper divisors (172125).

220995 is a wasteful number, since it uses less digits than its factorization.

220995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1645 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 220995 is about 470.1010529663. The cubic root of 220995 is about 60.4589800032.

It can be divided in two parts, 2209 and 95, that added together give a square (2304 = 48²).

The spelling of 220995 in words is "two hundred twenty thousand, nine hundred ninety-five".