225689545 has 4 divisors (see below), whose sum is σ = 270827460. Its totient is φ = 180551632.

The previous prime is 225689531. The next prime is 225689549. The reversal of 225689545 is 545986522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64577296 + 161112249 = 8036^2 + 12693^2 .

It is a cyclic number.

It is not a de Polignac number, because 225689545 - 2⁷ = 225689417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225689495 and 225689504.

It is not an unprimeable number, because it can be changed into a prime (225689549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22568950 + ... + 22568959.

It is an arithmetic number, because the mean of its divisors is an integer number (67706865).

Almost surely, 2^225689545 is an apocalyptic number.

It is an amenable number.

225689545 is a deficient number, since it is larger than the sum of its proper divisors (45137915).

225689545 is an equidigital number, since it uses as much as digits as its factorization.

225689545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45137914.

The product of its digits is 864000, while the sum is 46.

The square root of 225689545 is about 15022.9672501806. The cubic root of 225689545 is about 608.8408921397.

The spelling of 225689545 in words is "two hundred twenty-five million, six hundred eighty-nine thousand, five hundred forty-five".