421216803 has 48 divisors (see below), whose sum is σ = 738616320. Its totient is φ = 225808128.

The previous prime is 421216787. The next prime is 421216819. The reversal of 421216803 is 308612124.

It is an interprime number because it is at equal distance from previous prime (421216787) and next prime (421216819).

It is not a de Polignac number, because 421216803 - 2⁴ = 421216787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421216823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 585478 + ... + 586196.

It is an arithmetic number, because the mean of its divisors is an integer number (15387840).

Almost surely, 2^421216803 is an apocalyptic number.

421216803 is a deficient number, since it is larger than the sum of its proper divisors (317399517).

421216803 is a wasteful number, since it uses less digits than its factorization.

421216803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 421216803 is about 20523.5670145323. The cubic root of 421216803 is about 749.6097543130.

Adding to 421216803 its reverse (308612124), we get a palindrome (729828927).

The spelling of 421216803 in words is "four hundred twenty-one million, two hundred sixteen thousand, eight hundred three".