82103138 has 16 divisors (see below), whose sum is σ = 132793080. Its totient is φ = 37846656.

The previous prime is 82103137. The next prime is 82103179. The reversal of 82103138 is 83130128.

It can be written as a sum of positive squares in 4 ways, for example, as 47375689 + 34727449 = 6883^2 + 5893^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (82103137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27956 + ... + 30752.

Almost surely, 2^82103138 is an apocalyptic number.

82103138 is a deficient number, since it is larger than the sum of its proper divisors (50689942).

82103138 is a wasteful number, since it uses less digits than its factorization.

82103138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 82103138 is about 9061.0781919151. The cubic root of 82103138 is about 434.6302190647.

The spelling of 82103138 in words is "eighty-two million, one hundred three thousand, one hundred thirty-eight".