231225345 has 96 divisors (see below), whose sum is σ = 462309120. Its totient is φ = 105960960.

The previous prime is 231225331. The next prime is 231225353. The reversal of 231225345 is 543522132.

It is a happy number.

231225345 is a `hidden beast` number, since 2 + 3 + 122 + 534 + 5 = 666.

It is not a de Polignac number, because 231225345 - 2⁴ = 231225329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 789019 + ... + 789311.

It is an arithmetic number, because the mean of its divisors is an integer number (4815720).

Almost surely, 2^231225345 is an apocalyptic number.

It is an amenable number.

231225345 is a deficient number, since it is larger than the sum of its proper divisors (231083775).

231225345 is a wasteful number, since it uses less digits than its factorization.

231225345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 404 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 231225345 is about 15206.0956527308. The cubic root of 231225345 is about 613.7786986247.

Adding to 231225345 its reverse (543522132), we get a palindrome (774747477).

The spelling of 231225345 in words is "two hundred thirty-one million, two hundred twenty-five thousand, three hundred forty-five".