204231421 has 16 divisors (see below), whose sum is σ = 226654848. Its totient is φ = 183040000.

The previous prime is 204231413. The next prime is 204231431. The reversal of 204231421 is 124132402.

It is a cyclic number.

It is not a de Polignac number, because 204231421 - 2³ = 204231413 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 (204231431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97101 + ... + 99181.

It is an arithmetic number, because the mean of its divisors is an integer number (14165928).

Almost surely, 2^204231421 is an apocalyptic number.

It is an amenable number.

204231421 is a deficient number, since it is larger than the sum of its proper divisors (22423427).

204231421 is a wasteful number, since it uses less digits than its factorization.

204231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 204231421 is about 14290.9559162430. The cubic root of 204231421 is about 588.8990490567.

Adding to 204231421 its reverse (124132402), we get a palindrome (328363823).

The spelling of 204231421 in words is "two hundred four million, two hundred thirty-one thousand, four hundred twenty-one".