421043303 has 2 divisors, whose sum is σ = 421043304. Its totient is φ = 421043302.

The previous prime is 421043279. The next prime is 421043317. The reversal of 421043303 is 303340124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421043303 - 2¹⁴ = 421026919 is a prime.

It is a super-2 number, since 2×421043303² = 354554926002299618, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421043323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210521651 + 210521652.

It is an arithmetic number, because the mean of its divisors is an integer number (210521652).

Almost surely, 2^421043303 is an apocalyptic number.

421043303 is a deficient number, since it is larger than the sum of its proper divisors (1).

421043303 is an equidigital number, since it uses as much as digits as its factorization.

421043303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 421043303 is about 20519.3397310927. The cubic root of 421043303 is about 749.5068182853.

Adding to 421043303 its reverse (303340124), we get a palindrome (724383427).

The spelling of 421043303 in words is "four hundred twenty-one million, forty-three thousand, three hundred three".