214805 has 4 divisors (see below), whose sum is σ = 257772. Its totient is φ = 171840.

The previous prime is 214789. The next prime is 214807. The reversal of 214805 is 508412.

214805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47524 + 167281 = 218^2 + 409^2 .

It is not a de Polignac number, because 214805 - 2⁴ = 214789 is a prime.

It is a super-2 number, since 2×214805² = 92282376050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21476 + ... + 21485.

It is an arithmetic number, because the mean of its divisors is an integer number (64443).

2²¹⁴⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

214805 is a deficient number, since it is larger than the sum of its proper divisors (42967).

214805 is an equidigital number, since it uses as much as digits as its factorization.

214805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42966.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 214805 is about 463.4706031670. The cubic root of 214805 is about 59.8891471722.

The spelling of 214805 in words is "two hundred fourteen thousand, eight hundred five".