8481631 has 4 divisors (see below), whose sum is σ = 8755264. Its totient is φ = 8208000.

The previous prime is 8481607. The next prime is 8481637. The reversal of 8481631 is 1361848.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8481631 - 2⁹ = 8481119 is a prime.

It is a super-2 number, since 2×8481631² = 143876128840322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 273601 = 8481631 / (8 + 4 + 8 + 1 + 6 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8481593 and 8481602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8481637) 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 3 ways as a sum of consecutive naturals, for example, 136770 + ... + 136831.

It is an arithmetic number, because the mean of its divisors is an integer number (2188816).

Almost surely, 2^8481631 is an apocalyptic number.

8481631 is a deficient number, since it is larger than the sum of its proper divisors (273633).

8481631 is a wasteful number, since it uses less digits than its factorization.

8481631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273632.

The product of its digits is 4608, while the sum is 31.

The square root of 8481631 is about 2912.3239860977. The cubic root of 8481631 is about 203.9356374554.

The spelling of 8481631 in words is "eight million, four hundred eighty-one thousand, six hundred thirty-one".