343405231 has 4 divisors (see below), whose sum is σ = 369821032. Its totient is φ = 316989432.

The previous prime is 343405229. The next prime is 343405241. The reversal of 343405231 is 132504343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132504343 = 193 ⋅686551.

It is a cyclic number.

It is not a de Polignac number, because 343405231 - 2¹ = 343405229 is a prime.

It is a super-2 number, since 2×343405231² = 235854305356326722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343405196 and 343405205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343405201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13207881 + ... + 13207906.

It is an arithmetic number, because the mean of its divisors is an integer number (92455258).

Almost surely, 2^343405231 is an apocalyptic number.

343405231 is a deficient number, since it is larger than the sum of its proper divisors (26415801).

343405231 is a wasteful number, since it uses less digits than its factorization.

343405231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26415800.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 343405231 is about 18531.1961567515. The cubic root of 343405231 is about 700.2755588574.

Adding to 343405231 its reverse (132504343), we get a palindrome (475909574).

The spelling of 343405231 in words is "three hundred forty-three million, four hundred five thousand, two hundred thirty-one".