82312191 has 24 divisors (see below), whose sum is σ = 131026896. Its totient is φ = 49472640.

The previous prime is 82312183. The next prime is 82312201. The reversal of 82312191 is 19121328.

It is not a de Polignac number, because 82312191 - 2³ = 82312183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82312151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3150 + ... + 13211.

It is an arithmetic number, because the mean of its divisors is an integer number (5459454).

Almost surely, 2^82312191 is an apocalyptic number.

82312191 is a deficient number, since it is larger than the sum of its proper divisors (48714705).

82312191 is a wasteful number, since it uses less digits than its factorization.

82312191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16423 (or 16420 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 82312191 is about 9072.6066265434. The cubic root of 82312191 is about 434.9987950819.

The spelling of 82312191 in words is "eighty-two million, three hundred twelve thousand, one hundred ninety-one".