343221131 has 4 divisors (see below), whose sum is σ = 374423064. Its totient is φ = 312019200.

The previous prime is 343221103. The next prime is 343221133. The reversal of 343221131 is 131122343.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 343221131 - 2¹⁰ = 343220107 is a prime.

It is a super-2 number, since 2×343221131² = 235601489529838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343221133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15600950 + ... + 15600971.

It is an arithmetic number, because the mean of its divisors is an integer number (93605766).

Almost surely, 2^343221131 is an apocalyptic number.

343221131 is a deficient number, since it is larger than the sum of its proper divisors (31201933).

343221131 is a wasteful number, since it uses less digits than its factorization.

343221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31201932.

The product of its digits is 432, while the sum is 20.

The square root of 343221131 is about 18526.2281914047. The cubic root of 343221131 is about 700.1503969362.

Adding to 343221131 its reverse (131122343), we get a palindrome (474343474).

It can be divided in two parts, 34322 and 1131, that added together give a palindrome (35453).

The spelling of 343221131 in words is "three hundred forty-three million, two hundred twenty-one thousand, one hundred thirty-one".