805551451 has 2 divisors, whose sum is σ = 805551452. Its totient is φ = 805551450.

The previous prime is 805551449. The next prime is 805551479. The reversal of 805551451 is 154155508.

805551451 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 805551451 - 2¹ = 805551449 is a prime.

Together with 805551449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (805555451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402775725 + 402775726.

It is an arithmetic number, because the mean of its divisors is an integer number (402775726).

Almost surely, 2^805551451 is an apocalyptic number.

805551451 is a deficient number, since it is larger than the sum of its proper divisors (1).

805551451 is an equidigital number, since it uses as much as digits as its factorization.

805551451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20000, while the sum is 34.

The square root of 805551451 is about 28382.2383014448. The cubic root of 805551451 is about 930.4601149434.

The spelling of 805551451 in words is "eight hundred five million, five hundred fifty-one thousand, four hundred fifty-one".