343221401 has 4 divisors (see below), whose sum is σ = 350524032. Its totient is φ = 335918772.

The previous prime is 343221397. The next prime is 343221413. The reversal of 343221401 is 104122343.

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 343221401 - 2² = 343221397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343221001) 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, 3651245 + ... + 3651338.

It is an arithmetic number, because the mean of its divisors is an integer number (87631008).

Almost surely, 2^343221401 is an apocalyptic number.

It is an amenable number.

343221401 is a deficient number, since it is larger than the sum of its proper divisors (7302631).

343221401 is an equidigital number, since it uses as much as digits as its factorization.

343221401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7302630.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 343221401 is about 18526.2354783696. The cubic root of 343221401 is about 700.1505805307.

Adding to 343221401 its reverse (104122343), we get a palindrome (447343744).

The spelling of 343221401 in words is "three hundred forty-three million, two hundred twenty-one thousand, four hundred one".