255874391 has 2 divisors, whose sum is σ = 255874392. Its totient is φ = 255874390.

The previous prime is 255874373. The next prime is 255874441. The reversal of 255874391 is 193478552.

255874391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255874391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255874331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127937195 + 127937196.

It is an arithmetic number, because the mean of its divisors is an integer number (127937196).

Almost surely, 2^255874391 is an apocalyptic number.

255874391 is a deficient number, since it is larger than the sum of its proper divisors (1).

255874391 is an equidigital number, since it uses as much as digits as its factorization.

255874391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 44.

The square root of 255874391 is about 15996.0742371371. The cubic root of 255874391 is about 634.8565538712.

The spelling of 255874391 in words is "two hundred fifty-five million, eight hundred seventy-four thousand, three hundred ninety-one".