225231645 has 32 divisors (see below), whose sum is σ = 369038592. Its totient is φ = 117268992.

The previous prime is 225231631. The next prime is 225231649. The reversal of 225231645 is 546132522.

It is not a de Polignac number, because 225231645 - 2⁵ = 225231613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225231649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111787 + ... + 113783.

It is an arithmetic number, because the mean of its divisors is an integer number (11532456).

Almost surely, 2^225231645 is an apocalyptic number.

It is an amenable number.

225231645 is a deficient number, since it is larger than the sum of its proper divisors (143806947).

225231645 is a wasteful number, since it uses less digits than its factorization.

225231645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its digits is 14400, while the sum is 30.

The square root of 225231645 is about 15007.7195136370. The cubic root of 225231645 is about 608.4288556241.

The spelling of 225231645 in words is "two hundred twenty-five million, two hundred thirty-one thousand, six hundred forty-five".