255851951 has 2 divisors, whose sum is σ = 255851952. Its totient is φ = 255851950.

The previous prime is 255851903. The next prime is 255851957. The reversal of 255851951 is 159158552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255851951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255851899 and 255851908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255851957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127925975 + 127925976.

It is an arithmetic number, because the mean of its divisors is an integer number (127925976).

Almost surely, 2^255851951 is an apocalyptic number.

255851951 is a deficient number, since it is larger than the sum of its proper divisors (1).

255851951 is an equidigital number, since it uses as much as digits as its factorization.

255851951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 41.

The square root of 255851951 is about 15995.3727996568. The cubic root of 255851951 is about 634.8379945077.

The spelling of 255851951 in words is "two hundred fifty-five million, eight hundred fifty-one thousand, nine hundred fifty-one".