231425225 has 12 divisors (see below), whose sum is σ = 302071440. Its totient is φ = 175395600.

The previous prime is 231425221. The next prime is 231425237. The reversal of 231425225 is 522524132.

231425225 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 231425225 - 2² = 231425221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231425194 and 231425203.

It is not an unprimeable number, because it can be changed into a prime (231425221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243131 + ... + 244080.

It is an arithmetic number, because the mean of its divisors is an integer number (25172620).

Almost surely, 2^231425225 is an apocalyptic number.

231425225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231425225 is a deficient number, since it is larger than the sum of its proper divisors (70646215).

231425225 is a wasteful number, since it uses less digits than its factorization.

231425225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487240 (or 487235 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 231425225 is about 15212.6665972800. Note that the first 3 decimals coincide. The cubic root of 231425225 is about 613.9555055875.

Adding to 231425225 its reverse (522524132), we get a palindrome (753949357).

The spelling of 231425225 in words is "two hundred thirty-one million, four hundred twenty-five thousand, two hundred twenty-five".