343181381 has 4 divisors (see below), whose sum is σ = 343239564. Its totient is φ = 343123200.

The previous prime is 343181369. The next prime is 343181387. The reversal of 343181381 is 183181343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183181343 = 223 ⋅821441.

It can be written as a sum of positive squares in 2 ways, for example, as 130896481 + 212284900 = 11441^2 + 14570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343181381 is a prime.

It is a super-2 number, since 2×343181381² = 235546920530134322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343181387) 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 3 ways as a sum of consecutive naturals, for example, 19100 + ... + 32421.

It is an arithmetic number, because the mean of its divisors is an integer number (85809891).

Almost surely, 2^343181381 is an apocalyptic number.

It is an amenable number.

343181381 is a deficient number, since it is larger than the sum of its proper divisors (58183).

343181381 is an equidigital number, since it uses as much as digits as its factorization.

343181381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58182.

The product of its digits is 6912, while the sum is 32.

The square root of 343181381 is about 18525.1553569734. The cubic root of 343181381 is about 700.1233666922.

The spelling of 343181381 in words is "three hundred forty-three million, one hundred eighty-one thousand, three hundred eighty-one".