225206380 has 24 divisors (see below), whose sum is σ = 540495648. Its totient is φ = 77213568.

The previous prime is 225206357. The next prime is 225206389. The reversal of 225206380 is 83602522.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (225206389) 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, 804169 + ... + 804448.

It is an arithmetic number, because the mean of its divisors is an integer number (22520652).

Almost surely, 2^225206380 is an apocalyptic number.

225206380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225206380 is an abundant number, since it is smaller than the sum of its proper divisors (315289268).

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

225206380 is a wasteful number, since it uses less digits than its factorization.

225206380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608633 (or 1608631 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 225206380 is about 15006.8777565488. The cubic root of 225206380 is about 608.4061049284.

It can be divided in two parts, 22520 and 6380, that added together give a square (28900 = 170²).

The spelling of 225206380 in words is "two hundred twenty-five million, two hundred six thousand, three hundred eighty".