421334351 has 2 divisors, whose sum is σ = 421334352. Its totient is φ = 421334350.

The previous prime is 421334323. The next prime is 421334357. The reversal of 421334351 is 153433124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421334351 - 2¹⁰ = 421333327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_22411682 and since 421334351 and 22411682 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421334351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421334357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210667175 + 210667176.

It is an arithmetic number, because the mean of its divisors is an integer number (210667176).

Almost surely, 2^421334351 is an apocalyptic number.

421334351 is a deficient number, since it is larger than the sum of its proper divisors (1).

421334351 is an equidigital number, since it uses as much as digits as its factorization.

421334351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 421334351 is about 20526.4305469802. The cubic root of 421334351 is about 749.6794784482.

Adding to 421334351 its reverse (153433124), we get a palindrome (574767475).

The spelling of 421334351 in words is "four hundred twenty-one million, three hundred thirty-four thousand, three hundred fifty-one".