205225770 has 32 divisors (see below), whose sum is σ = 493251840. Its totient is φ = 54648000.

The previous prime is 205225763. The next prime is 205225771. The reversal of 205225770 is 77522502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (205225771) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17976 + ... + 27084.

It is an arithmetic number, because the mean of its divisors is an integer number (15414120).

Almost surely, 2^205225770 is an apocalyptic number.

205225770 is an abundant number, since it is smaller than the sum of its proper divisors (288026070).

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

205225770 is a wasteful number, since it uses less digits than its factorization.

205225770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 205225770 is about 14325.7031241053. The cubic root of 205225770 is about 589.8532336270.

The spelling of 205225770 in words is "two hundred five million, two hundred twenty-five thousand, seven hundred seventy".