133115251 has 2 divisors, whose sum is σ = 133115252. Its totient is φ = 133115250.

The previous prime is 133115221. The next prime is 133115261. The reversal of 133115251 is 152511331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133115251 - 2⁷ = 133115123 is a prime.

It is not a weakly prime, because it can be changed into another prime (133115201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66557625 + 66557626.

It is an arithmetic number, because the mean of its divisors is an integer number (66557626).

Almost surely, 2^133115251 is an apocalyptic number.

133115251 is a deficient number, since it is larger than the sum of its proper divisors (1).

133115251 is an equidigital number, since it uses as much as digits as its factorization.

133115251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 22.

The square root of 133115251 is about 11537.5582772093. The cubic root of 133115251 is about 510.5942720191.

Adding to 133115251 its reverse (152511331), we get a palindrome (285626582).

The spelling of 133115251 in words is "one hundred thirty-three million, one hundred fifteen thousand, two hundred fifty-one".