8131812 has 24 divisors (see below), whose sum is σ = 20434176. Its totient is φ = 2502048.

The previous prime is 8131807. The next prime is 8131853. The reversal of 8131812 is 2181318.

It is a super-2 number, since 2×8131812² = 132252732806688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25908 + ... + 26219.

It is an arithmetic number, because the mean of its divisors is an integer number (851424).

Almost surely, 2^8131812 is an apocalyptic number.

It is an amenable number.

8131812 is an abundant number, since it is smaller than the sum of its proper divisors (12302364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8131812 is a wasteful number, since it uses less digits than its factorization.

8131812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52147 (or 52145 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

The square root of 8131812 is about 2851.6332162464. The cubic root of 8131812 is about 201.0924551768.

The spelling of 8131812 in words is "eight million, one hundred thirty-one thousand, eight hundred twelve".