343320423557 has 2 divisors, whose sum is σ = 343320423558. Its totient is φ = 343320423556.

The previous prime is 343320423491. The next prime is 343320423577. The reversal of 343320423557 is 755324023343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341609856676 + 1710566881 = 584474^2 + 41359^2 .

It is a cyclic number.

It is not a de Polignac number, because 343320423557 - 2³⁶ = 274600946821 is a prime.

It is a super-3 number, since 3×343320423557³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343320423577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171660211778 + 171660211779.

It is an arithmetic number, because the mean of its divisors is an integer number (171660211779).

Almost surely, 2^343320423557 is an apocalyptic number.

It is an amenable number.

343320423557 is a deficient number, since it is larger than the sum of its proper divisors (1).

343320423557 is an equidigital number, since it uses as much as digits as its factorization.

343320423557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 41.

The spelling of 343320423557 in words is "three hundred forty-three billion, three hundred twenty million, four hundred twenty-three thousand, five hundred fifty-seven".