343112521523 has 2 divisors, whose sum is σ = 343112521524. Its totient is φ = 343112521522.

The previous prime is 343112521513. The next prime is 343112521547. The reversal of 343112521523 is 325125211343.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 343112521523 - 2⁸ = 343112521267 is a prime.

It is a super-2 number, since 2×343112521523² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 343112521523.

It is not a weakly prime, because it can be changed into another prime (343112521513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171556260761 + 171556260762.

It is an arithmetic number, because the mean of its divisors is an integer number (171556260762).

Almost surely, 2^343112521523 is an apocalyptic number.

343112521523 is a deficient number, since it is larger than the sum of its proper divisors (1).

343112521523 is an equidigital number, since it uses as much as digits as its factorization.

343112521523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

Adding to 343112521523 its reverse (325125211343), we get a palindrome (668237732866).

The spelling of 343112521523 in words is "three hundred forty-three billion, one hundred twelve million, five hundred twenty-one thousand, five hundred twenty-three".