8216631 has 6 divisors (see below), whose sum is σ = 11868480. Its totient is φ = 5477748.

The previous prime is 8216609. The next prime is 8216641. The reversal of 8216631 is 1366128.

8216631 is a `hidden beast` number, since 8 + 21 + 6 + 631 = 666.

It is not a de Polignac number, because 8216631 - 2⁷ = 8216503 is a prime.

It is a super-2 number, since 2×8216631² = 135026049980322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8216595 and 8216604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8216641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 456471 + ... + 456488.

It is an arithmetic number, because the mean of its divisors is an integer number (1978080).

Almost surely, 2^8216631 is an apocalyptic number.

8216631 is a deficient number, since it is larger than the sum of its proper divisors (3651849).

8216631 is a wasteful number, since it uses less digits than its factorization.

8216631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912965 (or 912962 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 8216631 is about 2866.4666403082. The cubic root of 8216631 is about 201.7892043417.

The spelling of 8216631 in words is "eight million, two hundred sixteen thousand, six hundred thirty-one".