133320251 has 2 divisors, whose sum is σ = 133320252. Its totient is φ = 133320250.

The previous prime is 133320241. The next prime is 133320269. The reversal of 133320251 is 152023331.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133320251 is a prime.

It is not a weakly prime, because it can be changed into another prime (133320211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66660125 + 66660126.

It is an arithmetic number, because the mean of its divisors is an integer number (66660126).

Almost surely, 2^133320251 is an apocalyptic number.

133320251 is a deficient number, since it is larger than the sum of its proper divisors (1).

133320251 is an equidigital number, since it uses as much as digits as its factorization.

133320251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 133320251 is about 11546.4388882460. The cubic root of 133320251 is about 510.8562458568.

Adding to 133320251 its reverse (152023331), we get a palindrome (285343582).

The spelling of 133320251 in words is "one hundred thirty-three million, three hundred twenty thousand, two hundred fifty-one".