133740251 has 2 divisors, whose sum is σ = 133740252. Its totient is φ = 133740250.

The previous prime is 133740223. The next prime is 133740283. The reversal of 133740251 is 152047331.

It is a weak prime.

It is an emirp because it is prime and its reverse (152047331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133740251 - 2²⁶ = 66631387 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133740251.

It is not a weakly prime, because it can be changed into another prime (133740151) 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, 66870125 + 66870126.

It is an arithmetic number, because the mean of its divisors is an integer number (66870126).

Almost surely, 2^133740251 is an apocalyptic number.

133740251 is a deficient number, since it is larger than the sum of its proper divisors (1).

133740251 is an equidigital number, since it uses as much as digits as its factorization.

133740251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 133740251 is about 11564.6120125147. The cubic root of 133740251 is about 511.3921352046.

Adding to 133740251 its reverse (152047331), we get a palindrome (285787582).

The spelling of 133740251 in words is "one hundred thirty-three million, seven hundred forty thousand, two hundred fifty-one".