255945491 has 2 divisors, whose sum is σ = 255945492. Its totient is φ = 255945490.

The previous prime is 255945479. The next prime is 255945511. The reversal of 255945491 is 194549552.

255945491 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 not a de Polignac number, because 255945491 - 2¹⁰ = 255944467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255945401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127972745 + 127972746.

It is an arithmetic number, because the mean of its divisors is an integer number (127972746).

Almost surely, 2^255945491 is an apocalyptic number.

255945491 is a deficient number, since it is larger than the sum of its proper divisors (1).

255945491 is an equidigital number, since it uses as much as digits as its factorization.

255945491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 44.

The square root of 255945491 is about 15998.2965030656. The cubic root of 255945491 is about 634.9153511071.

The spelling of 255945491 in words is "two hundred fifty-five million, nine hundred forty-five thousand, four hundred ninety-one".