225552332421 has 36 divisors (see below), whose sum is σ = 362542500684. Its totient is φ = 134323902720.

The previous prime is 225552332419. The next prime is 225552332443. The reversal of 225552332421 is 124233255522.

It is a happy number.

225552332421 is a `hidden beast` number, since 2 + 255 + 52 + 332 + 4 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18059328225 + 207493004196 = 134385^2 + 455514^2 .

It is not a de Polignac number, because 225552332421 - 2¹ = 225552332419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225552332021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 890580 + ... + 1115453.

It is an arithmetic number, because the mean of its divisors is an integer number (10070625019).

Almost surely, 2^225552332421 is an apocalyptic number.

It is an amenable number.

225552332421 is a deficient number, since it is larger than the sum of its proper divisors (136990168263).

225552332421 is a wasteful number, since it uses less digits than its factorization.

225552332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006114 (or 2006080 counting only the distinct ones).

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

Adding to 225552332421 its reverse (124233255522), we get a palindrome (349785587943).

The spelling of 225552332421 in words is "two hundred twenty-five billion, five hundred fifty-two million, three hundred thirty-two thousand, four hundred twenty-one".