231225225 has 48 divisors (see below), whose sum is σ = 476636160. Its totient is φ = 96091200.

The previous prime is 231225223. The next prime is 231225229. The reversal of 231225225 is 522522132.

231225225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231225225 - 2¹ = 231225223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231225195 and 231225204.

It is not an unprimeable number, because it can be changed into a prime (231225221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14245 + ... + 25794.

It is an arithmetic number, because the mean of its divisors is an integer number (9929920).

Almost surely, 2^231225225 is an apocalyptic number.

231225225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231225225 is an abundant number, since it is smaller than the sum of its proper divisors (245410935).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231225225 is a wasteful number, since it uses less digits than its factorization.

231225225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40070 (or 40065 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 231225225 is about 15206.0917069443. The cubic root of 231225225 is about 613.7785924463.

Adding to 231225225 its reverse (522522132), we get a palindrome (753747357).

It can be divided in two parts, 231 and 225225, that added together give a triangular number (225456 = T₆₇₁).

The spelling of 231225225 in words is "two hundred thirty-one million, two hundred twenty-five thousand, two hundred twenty-five".