343581 has 8 divisors (see below), whose sum is σ = 523584. Its totient is φ = 196320.

The previous prime is 343579. The next prime is 343583. The reversal of 343581 is 185343.

It is an interprime number because it is at equal distance from previous prime (343579) and next prime (343583).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 343581 - 2¹ = 343579 is a prime.

It is a super-2 number, since 2×343581² = 236095807122, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8160 + ... + 8201.

It is an arithmetic number, because the mean of its divisors is an integer number (65448).

2³⁴³⁵⁸¹ is an apocalyptic number.

It is an amenable number.

343581 is a deficient number, since it is larger than the sum of its proper divisors (180003).

343581 is a wasteful number, since it uses less digits than its factorization.

343581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16371.

The product of its digits is 1440, while the sum is 24.

The square root of 343581 is about 586.1578285752. The cubic root of 343581 is about 70.0395015143.

The spelling of 343581 in words is "three hundred forty-three thousand, five hundred eighty-one".