133232257 has 2 divisors, whose sum is σ = 133232258. Its totient is φ = 133232256.

The previous prime is 133232249. The next prime is 133232273. The reversal of 133232257 is 752232331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126135361 + 7096896 = 11231^2 + 2664^2 .

It is an emirp because it is prime and its reverse (752232331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133232257 - 2³ = 133232249 is a prime.

It is not a weakly prime, because it can be changed into another prime (133232287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66616128 + 66616129.

It is an arithmetic number, because the mean of its divisors is an integer number (66616129).

Almost surely, 2^133232257 is an apocalyptic number.

It is an amenable number.

133232257 is a deficient number, since it is larger than the sum of its proper divisors (1).

133232257 is an equidigital number, since it uses as much as digits as its factorization.

133232257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 28.

The square root of 133232257 is about 11542.6278203882. The cubic root of 133232257 is about 510.7438293820.

Adding to 133232257 its reverse (752232331), we get a palindrome (885464588).

The spelling of 133232257 in words is "one hundred thirty-three million, two hundred thirty-two thousand, two hundred fifty-seven".