8102131 has 4 divisors (see below), whose sum is σ = 8110312. Its totient is φ = 8093952.

The previous prime is 8102117. The next prime is 8102137. The reversal of 8102131 is 1312018.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8102131 is a prime.

It is a super-2 number, since 2×8102131² = 131289053482322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8102137) 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, 2361 + ... + 4666.

It is an arithmetic number, because the mean of its divisors is an integer number (2027578).

Almost surely, 2^8102131 is an apocalyptic number.

8102131 is a deficient number, since it is larger than the sum of its proper divisors (8181).

8102131 is a wasteful number, since it uses less digits than its factorization.

8102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8180.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 8102131 is about 2846.4242480698. The cubic root of 8102131 is about 200.8474953522.

Adding to 8102131 its reverse (1312018), we get a palindrome (9414149).

The spelling of 8102131 in words is "eight million, one hundred two thousand, one hundred thirty-one".