225452661 has 16 divisors (see below), whose sum is σ = 344400000. Its totient is φ = 128510208.

The previous prime is 225452653. The next prime is 225452671. The reversal of 225452661 is 166254522.

It is not a de Polignac number, because 225452661 - 2³ = 225452653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225452611) 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 15 ways as a sum of consecutive naturals, for example, 4536 + ... + 21713.

It is an arithmetic number, because the mean of its divisors is an integer number (21525000).

Almost surely, 2^225452661 is an apocalyptic number.

225452661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

225452661 is a deficient number, since it is larger than the sum of its proper divisors (118947339).

225452661 is a wasteful number, since it uses less digits than its factorization.

225452661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26668.

The product of its digits is 28800, while the sum is 33.

The square root of 225452661 is about 15015.0811186620. The cubic root of 225452661 is about 608.6278042083.

The spelling of 225452661 in words is "two hundred twenty-five million, four hundred fifty-two thousand, six hundred sixty-one".