343121131 has 4 divisors (see below), whose sum is σ = 343161000. Its totient is φ = 343081264.

The previous prime is 343121059. The next prime is 343121147. The reversal of 343121131 is 131121343.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 131121343 = 1553 ⋅84431.

It is a cyclic number.

It is not a de Polignac number, because 343121131 - 2⁹ = 343120619 is a prime.

It is a super-2 number, since 2×343121131² = 235464221077438322, 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 = 343121099 and 343121108.

It is not an unprimeable number, because it can be changed into a prime (343121161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081 + ... + 26218.

It is an arithmetic number, because the mean of its divisors is an integer number (85790250).

Almost surely, 2^343121131 is an apocalyptic number.

343121131 is a deficient number, since it is larger than the sum of its proper divisors (39869).

343121131 is a wasteful number, since it uses less digits than its factorization.

343121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39868.

The product of its digits is 216, while the sum is 19.

The square root of 343121131 is about 18523.5291183943. The cubic root of 343121131 is about 700.0823923426.

Adding to 343121131 its reverse (131121343), we get a palindrome (474242474).

The spelling of 343121131 in words is "three hundred forty-three million, one hundred twenty-one thousand, one hundred thirty-one".