201421803 has 24 divisors (see below), whose sum is σ = 295989904. Its totient is φ = 121746240.

The previous prime is 201421799. The next prime is 201421841. The reversal of 201421803 is 308124102.

201421803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201421803 - 2² = 201421799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201421803.

It is not an unprimeable number, because it can be changed into a prime (201421853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265701 + ... + 266457.

Almost surely, 2^201421803 is an apocalyptic number.

201421803 is a deficient number, since it is larger than the sum of its proper divisors (94568101).

201421803 is a wasteful number, since it uses less digits than its factorization.

201421803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 201421803 is about 14192.3149274528. The cubic root of 201421803 is about 586.1860690754.

Adding to 201421803 its reverse (308124102), we get a palindrome (509545905).

It can be divided in two parts, 20142 and 1803, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 201421803 in words is "two hundred one million, four hundred twenty-one thousand, eight hundred three".