225925986 has 64 divisors (see below), whose sum is σ = 539965440. Its totient is φ = 62111040.

The previous prime is 225925981. The next prime is 225926023. The reversal of 225925986 is 689529522.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225925981) 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 31 ways as a sum of consecutive naturals, for example, 48391 + ... + 52853.

It is an arithmetic number, because the mean of its divisors is an integer number (8436960).

Almost surely, 2^225925986 is an apocalyptic number.

225925986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 225925986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269982720).

225925986 is an abundant number, since it is smaller than the sum of its proper divisors (314039454).

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

225925986 is a wasteful number, since it uses less digits than its factorization.

225925986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551.

The product of its digits is 777600, while the sum is 48.

The square root of 225925986 is about 15030.8345077710. The cubic root of 225925986 is about 609.0534329373.

The spelling of 225925986 in words is "two hundred twenty-five million, nine hundred twenty-five thousand, nine hundred eighty-six".