214400321 has 4 divisors (see below), whose sum is σ = 214549332. Its totient is φ = 214251312.

The previous prime is 214400281. The next prime is 214400327. The reversal of 214400321 is 123004412.

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 131790400 + 82609921 = 11480^2 + 9089^2 .

It is a cyclic number.

It is not a de Polignac number, because 214400321 - 2²⁶ = 147291457 is a prime.

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 214400321.

It is not an unprimeable number, because it can be changed into a prime (214400327) 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, 72326 + ... + 75231.

It is an arithmetic number, because the mean of its divisors is an integer number (53637333).

Almost surely, 2^214400321 is an apocalyptic number.

It is an amenable number.

214400321 is a deficient number, since it is larger than the sum of its proper divisors (149011).

214400321 is a wasteful number, since it uses less digits than its factorization.

214400321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149010.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 214400321 is about 14642.4151354891. The cubic root of 214400321 is about 598.5151441104.

Adding to 214400321 its reverse (123004412), we get a palindrome (337404733).

The spelling of 214400321 in words is "two hundred fourteen million, four hundred thousand, three hundred twenty-one".