225546505 has 4 divisors (see below), whose sum is σ = 270655812. Its totient is φ = 180437200.

The previous prime is 225546493. The next prime is 225546509. The reversal of 225546505 is 505645522.

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 142754704 + 82791801 = 11948^2 + 9099^2 .

It is not a de Polignac number, because 225546505 - 2¹⁵ = 225513737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225546509) 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, 22554646 + ... + 22554655.

It is an arithmetic number, because the mean of its divisors is an integer number (67663953).

Almost surely, 2^225546505 is an apocalyptic number.

It is an amenable number.

225546505 is a deficient number, since it is larger than the sum of its proper divisors (45109307).

225546505 is an equidigital number, since it uses as much as digits as its factorization.

225546505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45109306.

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 225546505 is about 15018.2057849798. The cubic root of 225546505 is about 608.7122389990.

The spelling of 225546505 in words is "two hundred twenty-five million, five hundred forty-six thousand, five hundred five".