225332554221 has 24 divisors (see below), whose sum is σ = 336490953344. Its totient is φ = 145193666400.

The previous prime is 225332554219. The next prime is 225332554229. The reversal of 225332554221 is 122455233522.

It is a happy number.

225332554221 is a `hidden beast` number, since 2 + 2 + 53 + 32 + 554 + 2 + 21 = 666.

It is not a de Polignac number, because 225332554221 - 2¹ = 225332554219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225332554229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2190361 + ... + 2290926.

Almost surely, 2^225332554221 is an apocalyptic number.

It is an amenable number.

225332554221 is a deficient number, since it is larger than the sum of its proper divisors (111158399123).

225332554221 is a wasteful number, since it uses less digits than its factorization.

225332554221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4481481 (or 4481478 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

Adding to 225332554221 its reverse (122455233522), we get a palindrome (347787787743).

The spelling of 225332554221 in words is "two hundred twenty-five billion, three hundred thirty-two million, five hundred fifty-four thousand, two hundred twenty-one".