75555133 has 2 divisors, whose sum is σ = 75555134. Its totient is φ = 75555132.

The previous prime is 75555131. The next prime is 75555197. The reversal of 75555133 is 33155557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75116889 + 438244 = 8667^2 + 662^2 .

It is an emirp because it is prime and its reverse (33155557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75555133 - 2¹ = 75555131 is a prime.

Together with 75555131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75555131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37777566 + 37777567.

It is an arithmetic number, because the mean of its divisors is an integer number (37777567).

Almost surely, 2^75555133 is an apocalyptic number.

It is an amenable number.

75555133 is a deficient number, since it is larger than the sum of its proper divisors (1).

75555133 is an equidigital number, since it uses as much as digits as its factorization.

75555133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39375, while the sum is 34.

The square root of 75555133 is about 8692.2455671708. The cubic root of 75555133 is about 422.7542589176.

The spelling of 75555133 in words is "seventy-five million, five hundred fifty-five thousand, one hundred thirty-three".