225681338 has 4 divisors (see below), whose sum is σ = 338522010. Its totient is φ = 112840668.

The previous prime is 225681331. The next prime is 225681349. The reversal of 225681338 is 833186522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 165199609 + 60481729 = 12853^2 + 7777^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225681331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56420333 + ... + 56420336.

Almost surely, 2^225681338 is an apocalyptic number.

225681338 is a deficient number, since it is larger than the sum of its proper divisors (112840672).

225681338 is a wasteful number, since it uses less digits than its factorization.

225681338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112840671.

The product of its digits is 69120, while the sum is 38.

The square root of 225681338 is about 15022.6940992620. The cubic root of 225681338 is about 608.8335120640.

The spelling of 225681338 in words is "two hundred twenty-five million, six hundred eighty-one thousand, three hundred thirty-eight".