8631481 has 4 divisors (see below), whose sum is σ = 8676864. Its totient is φ = 8586100.

The previous prime is 8631479. The next prime is 8631499. The reversal of 8631481 is 1841368.

8631481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8631481 - 2¹ = 8631479 is a prime.

It is a super-2 number, since 2×8631481² = 149004928506722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8631401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22405 + ... + 22786.

It is an arithmetic number, because the mean of its divisors is an integer number (2169216).

Almost surely, 2^8631481 is an apocalyptic number.

It is an amenable number.

8631481 is a deficient number, since it is larger than the sum of its proper divisors (45383).

8631481 is a wasteful number, since it uses less digits than its factorization.

8631481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45382.

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

The square root of 8631481 is about 2937.9382226316. The cubic root of 8631481 is about 205.1296502888.

The spelling of 8631481 in words is "eight million, six hundred thirty-one thousand, four hundred eighty-one".