214031321 has 4 divisors (see below), whose sum is σ = 244607232. Its totient is φ = 183455412.

The previous prime is 214031317. The next prime is 214031329. The reversal of 214031321 is 123130412.

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 214031321 - 2² = 214031317 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 214031321.

It is not an unprimeable number, because it can be changed into a prime (214031329) 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, 15287945 + ... + 15287958.

It is an arithmetic number, because the mean of its divisors is an integer number (61151808).

Almost surely, 2^214031321 is an apocalyptic number.

It is an amenable number.

214031321 is a deficient number, since it is larger than the sum of its proper divisors (30575911).

214031321 is an equidigital number, since it uses as much as digits as its factorization.

214031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30575910.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 214031321 is about 14629.8093289010. The cubic root of 214031321 is about 598.1715828853.

Adding to 214031321 its reverse (123130412), we get a palindrome (337161733).

Subtracting from 214031321 its reverse (123130412), we obtain a palindrome (90900909).

The spelling of 214031321 in words is "two hundred fourteen million, thirty-one thousand, three hundred twenty-one".