343321031 has 2 divisors, whose sum is σ = 343321032. Its totient is φ = 343321030.

The previous prime is 343320983. The next prime is 343321037. The reversal of 343321031 is 130123343.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 343321031 - 2¹⁸ = 343058887 is a prime.

It is a super-3 number, since 3×343321031³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 343320994 and 343321012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343321037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171660515 + 171660516.

It is an arithmetic number, because the mean of its divisors is an integer number (171660516).

Almost surely, 2^343321031 is an apocalyptic number.

343321031 is a deficient number, since it is larger than the sum of its proper divisors (1).

343321031 is an equidigital number, since it uses as much as digits as its factorization.

343321031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 343321031 is about 18528.9241727630. The cubic root of 343321031 is about 700.2183203372.

Adding to 343321031 its reverse (130123343), we get a palindrome (473444374).

The spelling of 343321031 in words is "three hundred forty-three million, three hundred twenty-one thousand, thirty-one".