203230021 has 8 divisors (see below), whose sum is σ = 209574144. Its totient is φ = 196970160.

The previous prime is 203230007. The next prime is 203230039. The reversal of 203230021 is 120032302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 203230021 - 2¹⁹ = 202705733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203229983 and 203230010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203230081) 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, 16150 + ... + 25831.

It is an arithmetic number, because the mean of its divisors is an integer number (26196768).

Almost surely, 2^203230021 is an apocalyptic number.

It is an amenable number.

203230021 is a deficient number, since it is larger than the sum of its proper divisors (6344123).

203230021 is a wasteful number, since it uses less digits than its factorization.

203230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42131.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 203230021 is about 14255.8767180416. The cubic root of 203230021 is about 587.9349629966.

Adding to 203230021 its reverse (120032302), we get a palindrome (323262323).

The spelling of 203230021 in words is "two hundred three million, two hundred thirty thousand, twenty-one".