343214400421 has 2 divisors, whose sum is σ = 343214400422. Its totient is φ = 343214400420.

The previous prime is 343214400413. The next prime is 343214400469. The reversal of 343214400421 is 124004412343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288825630625 + 54388769796 = 537425^2 + 233214^2 .

It is a cyclic number.

It is not a de Polignac number, because 343214400421 - 2³ = 343214400413 is a prime.

It is a super-2 number, since 2×343214400421² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 343214400421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343214400121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171607200210 + 171607200211.

It is an arithmetic number, because the mean of its divisors is an integer number (171607200211).

Almost surely, 2^343214400421 is an apocalyptic number.

It is an amenable number.

343214400421 is a deficient number, since it is larger than the sum of its proper divisors (1).

343214400421 is an equidigital number, since it uses as much as digits as its factorization.

343214400421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 343214400421 its reverse (124004412343), we get a palindrome (467218812764).

The spelling of 343214400421 in words is "three hundred forty-three billion, two hundred fourteen million, four hundred thousand, four hundred twenty-one".