343465816421 has 24 divisors (see below), whose sum is σ = 425251499904. Its totient is φ = 271624242240.

The previous prime is 343465816381. The next prime is 343465816439. The reversal of 343465816421 is 124618564343.

It is not a de Polignac number, because 343465816421 - 2⁶ = 343465816357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343465816471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2465000 + ... + 2600606.

It is an arithmetic number, because the mean of its divisors is an integer number (17718812496).

Almost surely, 2^343465816421 is an apocalyptic number.

It is an amenable number.

343465816421 is a deficient number, since it is larger than the sum of its proper divisors (81785683483).

343465816421 is a wasteful number, since it uses less digits than its factorization.

343465816421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137781 (or 137768 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 47.

The spelling of 343465816421 in words is "three hundred forty-three billion, four hundred sixty-five million, eight hundred sixteen thousand, four hundred twenty-one".