421313303 has 4 divisors (see below), whose sum is σ = 422151408. Its totient is φ = 420475200.

The previous prime is 421313279. The next prime is 421313317. The reversal of 421313303 is 303313124.

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 421313303 - 2¹⁶ = 421247767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421313383) 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, 418298 + ... + 419303.

It is an arithmetic number, because the mean of its divisors is an integer number (105537852).

Almost surely, 2^421313303 is an apocalyptic number.

421313303 is a deficient number, since it is larger than the sum of its proper divisors (838105).

421313303 is an equidigital number, since it uses as much as digits as its factorization.

421313303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838104.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 421313303 is about 20525.9178357510. The cubic root of 421313303 is about 749.6669946837. Note that the first 3 decimals are identical.

Adding to 421313303 its reverse (303313124), we get a palindrome (724626427).

The spelling of 421313303 in words is "four hundred twenty-one million, three hundred thirteen thousand, three hundred three".