225643641 has 8 divisors (see below), whose sum is σ = 302539680. Its totient is φ = 149588352.

The previous prime is 225643619. The next prime is 225643667. The reversal of 225643641 is 146346522.

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

It is not a de Polignac number, because 225643641 - 2⁹ = 225643129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225643681) 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, 209560 + ... + 210633.

It is an arithmetic number, because the mean of its divisors is an integer number (37817460).

Almost surely, 2^225643641 is an apocalyptic number.

It is an amenable number.

225643641 is a deficient number, since it is larger than the sum of its proper divisors (76896039).

225643641 is a wasteful number, since it uses less digits than its factorization.

225643641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420375.

The product of its digits is 34560, while the sum is 33.

The square root of 225643641 is about 15021.4393784351. The cubic root of 225643641 is about 608.7996110554.

The spelling of 225643641 in words is "two hundred twenty-five million, six hundred forty-three thousand, six hundred forty-one".