225565869 has 4 divisors (see below), whose sum is σ = 300754496. Its totient is φ = 150377244.

The previous prime is 225565867. The next prime is 225565871. The reversal of 225565869 is 968565522.

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 an interprime number because it is at equal distance from previous prime (225565867) and next prime (225565871).

It is not a de Polignac number, because 225565869 - 2¹ = 225565867 is a prime.

It is a super-2 number, since 2×225565869² = 101759922515450322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225565867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37594309 + ... + 37594314.

It is an arithmetic number, because the mean of its divisors is an integer number (75188624).

Almost surely, 2^225565869 is an apocalyptic number.

It is an amenable number.

225565869 is a deficient number, since it is larger than the sum of its proper divisors (75188627).

225565869 is an equidigital number, since it uses as much as digits as its factorization.

225565869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75188626.

The product of its digits is 1296000, while the sum is 48.

The square root of 225565869 is about 15018.8504553444. The cubic root of 225565869 is about 608.7296585647.

The spelling of 225565869 in words is "two hundred twenty-five million, five hundred sixty-five thousand, eight hundred sixty-nine".