343112521531 has 4 divisors (see below), whose sum is σ = 369505792432. Its totient is φ = 316719250632.

The previous prime is 343112521523. The next prime is 343112521547. The reversal of 343112521531 is 135125211343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135125211343 = 37 ⋅3652032739.

It is a cyclic number.

It is not a de Polignac number, because 343112521531 - 2³ = 343112521523 is a prime.

It is a super-2 number, since 2×343112521531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343112521493 and 343112521502.

It is not an unprimeable number, because it can be changed into a prime (343112521561) 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, 13196635431 + ... + 13196635456.

It is an arithmetic number, because the mean of its divisors is an integer number (92376448108).

Almost surely, 2^343112521531 is an apocalyptic number.

343112521531 is a deficient number, since it is larger than the sum of its proper divisors (26393270901).

343112521531 is a wasteful number, since it uses less digits than its factorization.

343112521531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26393270900.

The product of its digits is 10800, while the sum is 31.

Adding to 343112521531 its reverse (135125211343), we get a palindrome (478237732874).

The spelling of 343112521531 in words is "three hundred forty-three billion, one hundred twelve million, five hundred twenty-one thousand, five hundred thirty-one".