82311813 has 12 divisors (see below), whose sum is σ = 119003040. Its totient is φ = 54824616.

The previous prime is 82311797. The next prime is 82311833. The reversal of 82311813 is 31811328.

It is not a de Polignac number, because 82311813 - 2⁴ = 82311797 is a prime.

It is a super-3 number, since 3×82311813³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82311833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8218 + ... + 15236.

It is an arithmetic number, because the mean of its divisors is an integer number (9916920).

Almost surely, 2^82311813 is an apocalyptic number.

It is an amenable number.

82311813 is a deficient number, since it is larger than the sum of its proper divisors (36691227).

82311813 is a wasteful number, since it uses less digits than its factorization.

82311813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328 (or 8325 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 82311813 is about 9072.5857945792. The cubic root of 82311813 is about 434.9981292032.

The spelling of 82311813 in words is "eighty-two million, three hundred eleven thousand, eight hundred thirteen".