214342021 has 4 divisors (see below), whose sum is σ = 225623200. Its totient is φ = 203060844.

The previous prime is 214342003. The next prime is 214342033. The reversal of 214342021 is 120243412.

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 214342021 - 2⁵ = 214341989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11281159 = 214342021 / (2 + 1 + 4 + 3 + 4 + 2 + 0 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 214342021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214342061) 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 3 ways as a sum of consecutive naturals, for example, 5640561 + ... + 5640598.

It is an arithmetic number, because the mean of its divisors is an integer number (56405800).

Almost surely, 2^214342021 is an apocalyptic number.

It is an amenable number.

214342021 is a deficient number, since it is larger than the sum of its proper divisors (11281179).

214342021 is a wasteful number, since it uses less digits than its factorization.

214342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11281178.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 214342021 is about 14640.4242083349. The cubic root of 214342021 is about 598.4608895334.

Adding to 214342021 its reverse (120243412), we get a palindrome (334585433).

The spelling of 214342021 in words is "two hundred fourteen million, three hundred forty-two thousand, twenty-one".