82115481 has 8 divisors (see below), whose sum is σ = 125128384. Its totient is φ = 46923120.

The previous prime is 82115459. The next prime is 82115483. The reversal of 82115481 is 18451128.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82115481 - 2⁷ = 82115353 is a prime.

It is a super-2 number, since 2×82115481² = 13485904439722722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82115483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1955110 + ... + 1955151.

It is an arithmetic number, because the mean of its divisors is an integer number (15641048).

Almost surely, 2^82115481 is an apocalyptic number.

It is an amenable number.

82115481 is a deficient number, since it is larger than the sum of its proper divisors (43012903).

82115481 is a wasteful number, since it uses less digits than its factorization.

82115481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910271.

The product of its digits is 2560, while the sum is 30.

The square root of 82115481 is about 9061.7592662794. The cubic root of 82115481 is about 434.6519980617.

The spelling of 82115481 in words is "eighty-two million, one hundred fifteen thousand, four hundred eighty-one".