214005421 has 4 divisors (see below), whose sum is σ = 244577632. Its totient is φ = 183433212.

The previous prime is 214005359. The next prime is 214005427. The reversal of 214005421 is 124500412.

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 a cyclic number.

It is not a de Polignac number, because 214005421 - 2⁷ = 214005293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214005427) 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, 15286095 + ... + 15286108.

It is an arithmetic number, because the mean of its divisors is an integer number (61144408).

Almost surely, 2^214005421 is an apocalyptic number.

It is an amenable number.

214005421 is a deficient number, since it is larger than the sum of its proper divisors (30572211).

214005421 is an equidigital number, since it uses as much as digits as its factorization.

214005421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30572210.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 214005421 is about 14628.9241231199. The cubic root of 214005421 is about 598.1474535992.

Adding to 214005421 its reverse (124500412), we get a palindrome (338505833).

The spelling of 214005421 in words is "two hundred fourteen million, five thousand, four hundred twenty-one".