225665314565 has 4 divisors (see below), whose sum is σ = 270798377484. Its totient is φ = 180532251648.

The previous prime is 225665314531. The next prime is 225665314571. The reversal of 225665314565 is 565413566522.

225665314565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56883204004 + 168782110561 = 238502^2 + 410831^2 .

It is a cyclic number.

It is not a de Polignac number, because 225665314565 - 2⁸ = 225665314309 is a prime.

It is a super-2 number, since 2×225665314565² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 22566531452 + ... + 22566531461.

It is an arithmetic number, because the mean of its divisors is an integer number (67699594371).

Almost surely, 2^225665314565 is an apocalyptic number.

It is an amenable number.

225665314565 is a deficient number, since it is larger than the sum of its proper divisors (45133062919).

225665314565 is an equidigital number, since it uses as much as digits as its factorization.

225665314565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45133062918.

The product of its digits is 6480000, while the sum is 50.

The spelling of 225665314565 in words is "two hundred twenty-five billion, six hundred sixty-five million, three hundred fourteen thousand, five hundred sixty-five".