343421431 has 4 divisors (see below), whose sum is σ = 348547192. Its totient is φ = 338295672.

The previous prime is 343421417. The next prime is 343421459. The reversal of 343421431 is 134124343.

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 343421431 - 2¹⁵ = 343388663 is a prime.

It is a super-2 number, since 2×343421431² = 235876558540175522, 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 = 343421396 and 343421405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343421401) 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, 2562780 + ... + 2562913.

It is an arithmetic number, because the mean of its divisors is an integer number (87136798).

Almost surely, 2^343421431 is an apocalyptic number.

343421431 is a deficient number, since it is larger than the sum of its proper divisors (5125761).

343421431 is an equidigital number, since it uses as much as digits as its factorization.

343421431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125760.

The product of its digits is 3456, while the sum is 25.

The square root of 343421431 is about 18531.6332523607. The cubic root of 343421431 is about 700.2865704211.

Adding to 343421431 its reverse (134124343), we get a palindrome (477545774).

The spelling of 343421431 in words is "three hundred forty-three million, four hundred twenty-one thousand, four hundred thirty-one".