225321620 has 24 divisors (see below), whose sum is σ = 475826400. Its totient is φ = 89623712.

The previous prime is 225321493. The next prime is 225321623. The reversal of 225321620 is 26123522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225321623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27890 + ... + 35049.

It is an arithmetic number, because the mean of its divisors is an integer number (19826100).

Almost surely, 2^225321620 is an apocalyptic number.

225321620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225321620 is an abundant number, since it is smaller than the sum of its proper divisors (250504780).

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

225321620 is a wasteful number, since it uses less digits than its factorization.

225321620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63127 (or 63125 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 225321620 is about 15010.7168383126. The cubic root of 225321620 is about 608.5098627406.

The spelling of 225321620 in words is "two hundred twenty-five million, three hundred twenty-one thousand, six hundred twenty".