343563421 has 16 divisors (see below), whose sum is σ = 384265728. Its totient is φ = 305625600.

The previous prime is 343563419. The next prime is 343563439. The reversal of 343563421 is 124365343.

It is a cyclic number.

It is not a de Polignac number, because 343563421 - 2¹ = 343563419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343563221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15081 + ... + 30241.

It is an arithmetic number, because the mean of its divisors is an integer number (24016608).

Almost surely, 2^343563421 is an apocalyptic number.

343563421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

343563421 is a deficient number, since it is larger than the sum of its proper divisors (40702307).

343563421 is a wasteful number, since it uses less digits than its factorization.

343563421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15252.

The product of its digits is 25920, while the sum is 31.

The square root of 343563421 is about 18535.4638733429. The cubic root of 343563421 is about 700.3830699214.

The spelling of 343563421 in words is "three hundred forty-three million, five hundred sixty-three thousand, four hundred twenty-one".