421916351 has 2 divisors, whose sum is σ = 421916352. Its totient is φ = 421916350.

The previous prime is 421916329. The next prime is 421916359. The reversal of 421916351 is 153619124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421916351 - 2¹⁰ = 421915327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421916359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210958175 + 210958176.

It is an arithmetic number, because the mean of its divisors is an integer number (210958176).

Almost surely, 2^421916351 is an apocalyptic number.

421916351 is a deficient number, since it is larger than the sum of its proper divisors (1).

421916351 is an equidigital number, since it uses as much as digits as its factorization.

421916351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 421916351 is about 20540.6024984663. The cubic root of 421916351 is about 750.0245034957.

The spelling of 421916351 in words is "four hundred twenty-one million, nine hundred sixteen thousand, three hundred fifty-one".