225717576421 has 4 divisors (see below), whose sum is σ = 225731902572. Its totient is φ = 225703250272.

The previous prime is 225717576397. The next prime is 225717576431. The reversal of 225717576421 is 124675717522.

It is a happy number.

225717576421 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 153576988321 + 72140588100 = 391889^2 + 268590^2 .

It is a cyclic number.

It is not a de Polignac number, because 225717576421 - 2³¹ = 223570092773 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225717576431) by changing a digit.

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, 7139416 + ... + 7170961.

It is an arithmetic number, because the mean of its divisors is an integer number (56432975643).

Almost surely, 2^225717576421 is an apocalyptic number.

It is an amenable number.

225717576421 is a deficient number, since it is larger than the sum of its proper divisors (14326151).

225717576421 is a wasteful number, since it uses less digits than its factorization.

225717576421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14326150.

The product of its digits is 1646400, while the sum is 49.

The spelling of 225717576421 in words is "two hundred twenty-five billion, seven hundred seventeen million, five hundred seventy-six thousand, four hundred twenty-one".