205341421 has 4 divisors (see below), whose sum is σ = 205371712. Its totient is φ = 205311132.

The previous prime is 205341413. The next prime is 205341439. The reversal of 205341421 is 124143502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 205341421 - 2³ = 205341413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205341392 and 205341401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205342421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220 + ... + 20266.

It is an arithmetic number, because the mean of its divisors is an integer number (51342928).

Almost surely, 2^205341421 is an apocalyptic number.

It is an amenable number.

205341421 is a deficient number, since it is larger than the sum of its proper divisors (30291).

205341421 is a wasteful number, since it uses less digits than its factorization.

205341421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30290.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 205341421 is about 14329.7390415876. The cubic root of 205341421 is about 589.9640129348.

Adding to 205341421 its reverse (124143502), we get a palindrome (329484923).

The spelling of 205341421 in words is "two hundred five million, three hundred forty-one thousand, four hundred twenty-one".