805328551 has 2 divisors, whose sum is σ = 805328552. Its totient is φ = 805328550.

The previous prime is 805328507. The next prime is 805328567. The reversal of 805328551 is 155823508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 805328551 - 2⁷ = 805328423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 805328551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805328501) 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, 402664275 + 402664276.

It is an arithmetic number, because the mean of its divisors is an integer number (402664276).

Almost surely, 2^805328551 is an apocalyptic number.

805328551 is a deficient number, since it is larger than the sum of its proper divisors (1).

805328551 is an equidigital number, since it uses as much as digits as its factorization.

805328551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 37.

The square root of 805328551 is about 28378.3112781575. The cubic root of 805328551 is about 930.3742860817.

The spelling of 805328551 in words is "eight hundred five million, three hundred twenty-eight thousand, five hundred fifty-one".