806421231 has 64 divisors (see below), whose sum is σ = 1577180160. Its totient is φ = 394260480.

The previous prime is 806421167. The next prime is 806421233. The reversal of 806421231 is 132124608.

806421231 is a `hidden beast` number, since 8 + 0 + 6 + 421 + 231 = 666.

It is not a de Polignac number, because 806421231 - 2⁶ = 806421167 is a prime.

It is a super-2 number, since 2×806421231² = 1300630403615110722, 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 = 806421195 and 806421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806421233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23935 + ... + 46751.

It is an arithmetic number, because the mean of its divisors is an integer number (24643440).

Almost surely, 2^806421231 is an apocalyptic number.

806421231 is a deficient number, since it is larger than the sum of its proper divisors (770758929).

806421231 is a wasteful number, since it uses less digits than its factorization.

806421231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22861 (or 22855 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 806421231 is about 28397.5567787090. The cubic root of 806421231 is about 930.7948771315.

Adding to 806421231 its reverse (132124608), we get a palindrome (938545839).

The spelling of 806421231 in words is "eight hundred six million, four hundred twenty-one thousand, two hundred thirty-one".