225889649 has 4 divisors (see below), whose sum is σ = 229592820. Its totient is φ = 222186480.

The previous prime is 225889639. The next prime is 225889663. The reversal of 225889649 is 946988522.

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 122257249 + 103632400 = 11057^2 + 10180^2 .

It is a cyclic number.

It is not a de Polignac number, because 225889649 - 2⁸ = 225889393 is a prime.

It is a super-2 number, since 2×225889649² = 102052267050686402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 225889649.

It is not an unprimeable number, because it can be changed into a prime (225889639) 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, 1851494 + ... + 1851615.

It is an arithmetic number, because the mean of its divisors is an integer number (57398205).

Almost surely, 2^225889649 is an apocalyptic number.

It is an amenable number.

225889649 is a deficient number, since it is larger than the sum of its proper divisors (3703171).

225889649 is an equidigital number, since it uses as much as digits as its factorization.

225889649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703170.

The product of its digits is 2488320, while the sum is 53.

The square root of 225889649 is about 15029.6257105758. The cubic root of 225889649 is about 609.0207786425.

The spelling of 225889649 in words is "two hundred twenty-five million, eight hundred eighty-nine thousand, six hundred forty-nine".