205225420 has 12 divisors (see below), whose sum is σ = 430973424. Its totient is φ = 82090160.

The previous prime is 205225387. The next prime is 205225439. The reversal of 205225420 is 24522502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 205225391 and 205225400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5130616 + ... + 5130655.

It is an arithmetic number, because the mean of its divisors is an integer number (35914452).

Almost surely, 2^205225420 is an apocalyptic number.

205225420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205225420 is an abundant number, since it is smaller than the sum of its proper divisors (225748004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205225420 is a wasteful number, since it uses less digits than its factorization.

205225420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10261280 (or 10261278 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 205225420 is about 14325.6909082948. The cubic root of 205225420 is about 589.8528983073.

Adding to 205225420 its reverse (24522502), we get a palindrome (229747922).

It can be divided in two parts, 2052 and 25420, that added together give a palindrome (27472).

The spelling of 205225420 in words is "two hundred five million, two hundred twenty-five thousand, four hundred twenty".