203201421 has 8 divisors (see below), whose sum is σ = 271043904. Its totient is φ = 135413280.

The previous prime is 203201407. The next prime is 203201423. The reversal of 203201421 is 124102302.

203201421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-203201421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203201421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203201423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865 + ... + 20526.

It is an arithmetic number, because the mean of its divisors is an integer number (33880488).

Almost surely, 2^203201421 is an apocalyptic number.

It is an amenable number.

203201421 is a deficient number, since it is larger than the sum of its proper divisors (67842483).

203201421 is a wasteful number, since it uses less digits than its factorization.

203201421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27171.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 203201421 is about 14254.8735876542. The cubic root of 203201421 is about 587.9073822145.

Adding to 203201421 its reverse (124102302), we get a palindrome (327303723).

The spelling of 203201421 in words is "two hundred three million, two hundred one thousand, four hundred twenty-one".