214921 has 4 divisors (see below), whose sum is σ = 245632. Its totient is φ = 184212.

The previous prime is 214913. The next prime is 214939. The reversal of 214921 is 129412.

214921 = 50² + 51² + ... + 91².

214921 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 214921 - 2³ = 214913 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (214021) 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, 15345 + ... + 15358.

It is an arithmetic number, because the mean of its divisors is an integer number (61408).

2²¹⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

214921 is a deficient number, since it is larger than the sum of its proper divisors (30711).

214921 is an equidigital number, since it uses as much as digits as its factorization.

214921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30710.

The product of its digits is 144, while the sum is 19.

The square root of 214921 is about 463.5957290571. The cubic root of 214921 is about 59.8999257712.

The spelling of 214921 in words is "two hundred fourteen thousand, nine hundred twenty-one".