225319905 has 12 divisors (see below), whose sum is σ = 390554580. Its totient is φ = 120170592.

The previous prime is 225319903. The next prime is 225319943. The reversal of 225319905 is 509913522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 92332881 + 132987024 = 9609^2 + 11532^2 .

It is not a de Polignac number, because 225319905 - 2¹ = 225319903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225319905.

It is not an unprimeable number, because it can be changed into a prime (225319903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2503510 + ... + 2503599.

It is an arithmetic number, because the mean of its divisors is an integer number (32546215).

Almost surely, 2^225319905 is an apocalyptic number.

It is an amenable number.

225319905 is a deficient number, since it is larger than the sum of its proper divisors (165234675).

225319905 is a wasteful number, since it uses less digits than its factorization.

225319905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007120 (or 5007117 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 225319905 is about 15010.6597123511. The cubic root of 225319905 is about 608.5083188777.

The spelling of 225319905 in words is "two hundred twenty-five million, three hundred nineteen thousand, nine hundred five".