343251551221 has 4 divisors (see below), whose sum is σ = 343735686700. Its totient is φ = 342767415744.

The previous prime is 343251551191. The next prime is 343251551243. The reversal of 343251551221 is 122155152343.

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 12035187025 + 331216364196 = 109705^2 + 575514^2 .

It is a cyclic number.

It is not a de Polignac number, because 343251551221 - 2³¹ = 341104067573 is a prime.

It is a super-3 number, since 3×343251551221³ (a number of 36 digits) contains 333 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 (343251555221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242066676 + ... + 242068093.

It is an arithmetic number, because the mean of its divisors is an integer number (85933921675).

Almost surely, 2^343251551221 is an apocalyptic number.

It is an amenable number.

343251551221 is a deficient number, since it is larger than the sum of its proper divisors (484135479).

343251551221 is an equidigital number, since it uses as much as digits as its factorization.

343251551221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484135478.

The product of its digits is 36000, while the sum is 34.

The spelling of 343251551221 in words is "three hundred forty-three billion, two hundred fifty-one million, five hundred fifty-one thousand, two hundred twenty-one".