231225133 has 4 divisors (see below), whose sum is σ = 231301980. Its totient is φ = 231148288.

The previous prime is 231225131. The next prime is 231225139. The reversal of 231225133 is 331522132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127735204 + 103489929 = 11302^2 + 10173^2 .

It is a cyclic number.

It is not a de Polignac number, because 231225133 - 2¹ = 231225131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231225131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33718 + ... + 39991.

It is an arithmetic number, because the mean of its divisors is an integer number (57825495).

Almost surely, 2^231225133 is an apocalyptic number.

It is an amenable number.

231225133 is a deficient number, since it is larger than the sum of its proper divisors (76847).

231225133 is an equidigital number, since it uses as much as digits as its factorization.

231225133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76846.

The product of its digits is 1080, while the sum is 22.

The square root of 231225133 is about 15206.0886818406. The cubic root of 231225133 is about 613.7785110427.

Adding to 231225133 its reverse (331522132), we get a palindrome (562747265).

The spelling of 231225133 in words is "two hundred thirty-one million, two hundred twenty-five thousand, one hundred thirty-three".