72100082 has 4 divisors (see below), whose sum is σ = 108150126. Its totient is φ = 36050040.

The previous prime is 72100081. The next prime is 72100097. The reversal of 72100082 is 28000127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28000127 = 571 ⋅49037.

It can be written as a sum of positive squares in only one way, i.e., 36590401 + 35509681 = 6049^2 + 5959^2 .

It is not an unprimeable number, because it can be changed into a prime (72100081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18025019 + ... + 18025022.

Almost surely, 2^72100082 is an apocalyptic number.

72100082 is a deficient number, since it is larger than the sum of its proper divisors (36050044).

72100082 is a wasteful number, since it uses less digits than its factorization.

72100082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36050043.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 72100082 is about 8491.1767146845. The cubic root of 72100082 is about 416.2094336524.

The spelling of 72100082 in words is "seventy-two million, one hundred thousand, eighty-two".