225816573 has 4 divisors (see below), whose sum is σ = 301088768. Its totient is φ = 150544380.

The previous prime is 225816557. The next prime is 225816581. The reversal of 225816573 is 375618522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 225816573 - 2⁴ = 225816557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225816583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37636093 + ... + 37636098.

It is an arithmetic number, because the mean of its divisors is an integer number (75272192).

Almost surely, 2^225816573 is an apocalyptic number.

It is an amenable number.

225816573 is a deficient number, since it is larger than the sum of its proper divisors (75272195).

225816573 is an equidigital number, since it uses as much as digits as its factorization.

225816573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75272194.

The product of its digits is 100800, while the sum is 39.

The square root of 225816573 is about 15027.1944487319. The cubic root of 225816573 is about 608.9550981910.

The spelling of 225816573 in words is "two hundred twenty-five million, eight hundred sixteen thousand, five hundred seventy-three".