805212508 has 6 divisors (see below), whose sum is σ = 1409121896. Its totient is φ = 402606252.

The previous prime is 805212487. The next prime is 805212509.

805212508 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 805212508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805212509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100651560 + ... + 100651567.

Almost surely, 2^805212508 is an apocalyptic number.

It is an amenable number.

805212508 is a deficient number, since it is larger than the sum of its proper divisors (603909388).

805212508 is a wasteful number, since it uses less digits than its factorization.

805212508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201303131 (or 201303129 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 805212508 is about 28376.2666325223. The cubic root of 805212508 is about 930.3295968224.

The spelling of 805212508 in words is "eight hundred five million, two hundred twelve thousand, five hundred eight".