214431321 has 16 divisors (see below), whose sum is σ = 324107840. Its totient is φ = 125012160.

The previous prime is 214431313. The next prime is 214431331. The reversal of 214431321 is 123134412.

It is not a de Polignac number, because 214431321 - 2³ = 214431313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214431331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143950 + ... + 145431.

It is an arithmetic number, because the mean of its divisors is an integer number (20256740).

Almost surely, 2^214431321 is an apocalyptic number.

It is an amenable number.

214431321 is a deficient number, since it is larger than the sum of its proper divisors (109676519).

214431321 is a wasteful number, since it uses less digits than its factorization.

214431321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289416.

The product of its digits is 576, while the sum is 21.

The square root of 214431321 is about 14643.4736657666. The cubic root of 214431321 is about 598.5439890226.

Adding to 214431321 its reverse (123134412), we get a palindrome (337565733).

The spelling of 214431321 in words is "two hundred fourteen million, four hundred thirty-one thousand, three hundred twenty-one".