805105250 has 32 divisors (see below), whose sum is σ = 1559142000. Its totient is φ = 310934400.

The previous prime is 805105243. The next prime is 805105289. The reversal of 805105250 is 52501508.

It can be written as a sum of positive squares in 8 ways, for example, as 71182969 + 733922281 = 8437^2 + 27091^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48275 + ... + 62774.

Almost surely, 2^805105250 is an apocalyptic number.

805105250 is a deficient number, since it is larger than the sum of its proper divisors (754036750).

805105250 is a wasteful number, since it uses less digits than its factorization.

805105250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111095 (or 111085 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 805105250 is about 28374.3766451353. The cubic root of 805105250 is about 930.2882869314.

Adding to 805105250 its reverse (52501508), we get a palindrome (857606758).

The spelling of 805105250 in words is "eight hundred five million, one hundred five thousand, two hundred fifty".