82130931 has 6 divisors (see below), whose sum is σ = 118633580. Its totient is φ = 54753948.

The previous prime is 82130921. The next prime is 82130933. The reversal of 82130931 is 13903128.

It is not a de Polignac number, because 82130931 - 2⁵ = 82130899 is a prime.

It is a super-2 number, since 2×82130931² = 13490979653853522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82130895 and 82130904.

It is not an unprimeable number, because it can be changed into a prime (82130933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4562821 + ... + 4562838.

Almost surely, 2^82130931 is an apocalyptic number.

82130931 is a deficient number, since it is larger than the sum of its proper divisors (36502649).

82130931 is a wasteful number, since it uses less digits than its factorization.

82130931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9125665 (or 9125662 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 82130931 is about 9062.6117096563. The cubic root of 82130931 is about 434.6792562277.

The spelling of 82130931 in words is "eighty-two million, one hundred thirty thousand, nine hundred thirty-one".