225431643 has 8 divisors (see below), whose sum is σ = 300650256. Its totient is φ = 150250400.

The previous prime is 225431627. The next prime is 225431651. The reversal of 225431643 is 346134522.

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 225431643 - 2⁴ = 225431627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225431643.

It is not an unprimeable number, because it can be changed into a prime (225431623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11173 + ... + 23993.

It is an arithmetic number, because the mean of its divisors is an integer number (37581282).

Almost surely, 2^225431643 is an apocalyptic number.

225431643 is a deficient number, since it is larger than the sum of its proper divisors (75218613).

225431643 is a wasteful number, since it uses less digits than its factorization.

225431643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18685.

The product of its digits is 17280, while the sum is 30.

The square root of 225431643 is about 15014.3812060304. The cubic root of 225431643 is about 608.6088903535.

The spelling of 225431643 in words is "two hundred twenty-five million, four hundred thirty-one thousand, six hundred forty-three".