225811669 has 4 divisors (see below), whose sum is σ = 225909280. Its totient is φ = 225714060.

The previous prime is 225811639. The next prime is 225811681. The reversal of 225811669 is 966118522.

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, and also an emirpimes, since its reverse is a distinct semiprime: 966118522 = 2 ⋅483059261.

It is a cyclic number.

It is not a de Polignac number, because 225811669 - 2⁷ = 225811541 is a prime.

It is a super-2 number, since 2×225811669² = 101981819713131122, 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 (225811639) 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, 45249 + ... + 49990.

It is an arithmetic number, because the mean of its divisors is an integer number (56477320).

Almost surely, 2^225811669 is an apocalyptic number.

It is an amenable number.

225811669 is a deficient number, since it is larger than the sum of its proper divisors (97611).

225811669 is an equidigital number, since it uses as much as digits as its factorization.

225811669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97610.

The product of its digits is 51840, while the sum is 40.

The square root of 225811669 is about 15027.0312770021. The cubic root of 225811669 is about 608.9506899857.

The spelling of 225811669 in words is "two hundred twenty-five million, eight hundred eleven thousand, six hundred sixty-nine".