334431221 has 4 divisors (see below), whose sum is σ = 334676172. Its totient is φ = 334186272.

The previous prime is 334431211. The next prime is 334431233. The reversal of 334431221 is 122134433.

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 236698225 + 97732996 = 15385^2 + 9886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-334431221 is a prime.

It is a super-2 number, since 2×334431221² = 223688483159101682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (334431211) 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, 120416 + ... + 123161.

It is an arithmetic number, because the mean of its divisors is an integer number (83669043).

Almost surely, 2^334431221 is an apocalyptic number.

It is an amenable number.

334431221 is a deficient number, since it is larger than the sum of its proper divisors (244951).

334431221 is a wasteful number, since it uses less digits than its factorization.

334431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244950.

The product of its digits is 1728, while the sum is 23.

The square root of 334431221 is about 18287.4607586729. The cubic root of 334431221 is about 694.1216729201.

Adding to 334431221 its reverse (122134433), we get a palindrome (456565654).

The spelling of 334431221 in words is "three hundred thirty-four million, four hundred thirty-one thousand, two hundred twenty-one".