255391133 has 2 divisors, whose sum is σ = 255391134. Its totient is φ = 255391132.

The previous prime is 255391111. The next prime is 255391183. The reversal of 255391133 is 331193552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237098404 + 18292729 = 15398^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 255391133 - 2¹⁸ = 255128989 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 255391133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255391183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127695566 + 127695567.

It is an arithmetic number, because the mean of its divisors is an integer number (127695567).

Almost surely, 2^255391133 is an apocalyptic number.

It is an amenable number.

255391133 is a deficient number, since it is larger than the sum of its proper divisors (1).

255391133 is an equidigital number, since it uses as much as digits as its factorization.

255391133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150, while the sum is 32.

The square root of 255391133 is about 15980.9615793293. The cubic root of 255391133 is about 634.4566273602.

The spelling of 255391133 in words is "two hundred fifty-five million, three hundred ninety-one thousand, one hundred thirty-three".