82181097 has 12 divisors (see below), whose sum is σ = 121601844. Its totient is φ = 53450880.

The previous prime is 82181089. The next prime is 82181101. The reversal of 82181097 is 79018128.

It can be written as a sum of positive squares in 2 ways, for example, as 38303721 + 43877376 = 6189^2 + 6624^2 .

It is not a de Polignac number, because 82181097 - 2³ = 82181089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82181497) 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, 110988 + ... + 111725.

It is an arithmetic number, because the mean of its divisors is an integer number (10133487).

Almost surely, 2^82181097 is an apocalyptic number.

It is an amenable number.

82181097 is a deficient number, since it is larger than the sum of its proper divisors (39420747).

82181097 is a wasteful number, since it uses less digits than its factorization.

82181097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222760 (or 222757 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 82181097 is about 9065.3790323406. The cubic root of 82181097 is about 434.7677396653.

It can be divided in two parts, 821 and 81097, that added together give a palindrome (81918).

The spelling of 82181097 in words is "eighty-two million, one hundred eighty-one thousand, ninety-seven".