225781369 has 8 divisors (see below), whose sum is σ = 260795808. Its totient is φ = 193181760.

The previous prime is 225781337. The next prime is 225781393. The reversal of 225781369 is 963187522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225781369 - 2⁵ = 225781337 is a prime.

It is a super-2 number, since 2×225781369² = 101954453175028322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225781319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603507 + ... + 603880.

It is an arithmetic number, because the mean of its divisors is an integer number (32599476).

Almost surely, 2^225781369 is an apocalyptic number.

It is an amenable number.

225781369 is a deficient number, since it is larger than the sum of its proper divisors (35014439).

225781369 is a wasteful number, since it uses less digits than its factorization.

225781369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207415.

The product of its digits is 181440, while the sum is 43.

The square root of 225781369 is about 15026.0230600116. The cubic root of 225781369 is about 608.9234519023.

The spelling of 225781369 in words is "two hundred twenty-five million, seven hundred eighty-one thousand, three hundred sixty-nine".