225232535421 has 6 divisors (see below), whose sum is σ = 325335884510. Its totient is φ = 150155023608.

The previous prime is 225232535389. The next prime is 225232535431. The reversal of 225232535421 is 124535232522.

It is a happy number.

225232535421 is a `hidden beast` number, since 2 + 2 + 52 + 32 + 535 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 174735704196 + 50496831225 = 418014^2 + 224715^2 .

It is not a de Polignac number, because 225232535421 - 2⁵ = 225232535389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225232535431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12512918626 + ... + 12512918643.

Almost surely, 2^225232535421 is an apocalyptic number.

It is an amenable number.

225232535421 is a deficient number, since it is larger than the sum of its proper divisors (100103349089).

225232535421 is a wasteful number, since it uses less digits than its factorization.

225232535421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25025837275 (or 25025837272 counting only the distinct ones).

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

Adding to 225232535421 its reverse (124535232522), we get a palindrome (349767767943).

The spelling of 225232535421 in words is "two hundred twenty-five billion, two hundred thirty-two million, five hundred thirty-five thousand, four hundred twenty-one".