805500531 has 36 divisors (see below), whose sum is σ = 1318142904. Its totient is φ = 488138400.

The previous prime is 805500461. The next prime is 805500539. The reversal of 805500531 is 135005508.

805500531 is a `hidden beast` number, since 80 + 5 + 50 + 0 + 531 = 666.

It is not a de Polignac number, because 805500531 - 2⁷ = 805500403 is a prime.

It is a super-2 number, since 2×805500531² = 1297662210882563922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 805500495 and 805500504.

It is not an unprimeable number, because it can be changed into a prime (805500539) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66591 + ... + 77751.

Almost surely, 2^805500531 is an apocalyptic number.

805500531 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

805500531 is a deficient number, since it is larger than the sum of its proper divisors (512642373).

805500531 is an equidigital number, since it uses as much as digits as its factorization.

805500531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11196 (or 11175 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 805500531 is about 28381.3412473759. The cubic root of 805500531 is about 930.4405093149.

The spelling of 805500531 in words is "eight hundred five million, five hundred thousand, five hundred thirty-one".