343224721 has 24 divisors (see below), whose sum is σ = 420038784. Its totient is φ = 274639680.

The previous prime is 343224701. The next prime is 343224733. The reversal of 343224721 is 127422343.

It is not a de Polignac number, because 343224721 - 2⁹ = 343224209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 343224721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343224701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178461 + ... + 180373.

It is an arithmetic number, because the mean of its divisors is an integer number (17501616).

Almost surely, 2^343224721 is an apocalyptic number.

It is an amenable number.

343224721 is a deficient number, since it is larger than the sum of its proper divisors (76814063).

343224721 is a wasteful number, since it uses less digits than its factorization.

343224721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029 (or 2010 counting only the distinct ones).

The product of its digits is 8064, while the sum is 28.

The square root of 343224721 is about 18526.3250808141. The cubic root of 343224721 is about 700.1528380555.

The spelling of 343224721 in words is "three hundred forty-three million, two hundred twenty-four thousand, seven hundred twenty-one".