82213853881 has 4 divisors (see below), whose sum is σ = 82226974500. Its totient is φ = 82200733264.

The previous prime is 82213853873. The next prime is 82213853929. The reversal of 82213853881 is 18835831228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42817955625 + 39395898256 = 206925^2 + 198484^2 .

It is a cyclic number.

It is not a de Polignac number, because 82213853881 - 2³ = 82213853873 is a prime.

It is a super-2 number, since 2×82213853881² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82213853801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6550906 + ... + 6563443.

It is an arithmetic number, because the mean of its divisors is an integer number (20556743625).

Almost surely, 2^82213853881 is an apocalyptic number.

It is an amenable number.

82213853881 is a deficient number, since it is larger than the sum of its proper divisors (13120619).

82213853881 is a wasteful number, since it uses less digits than its factorization.

82213853881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13120618.

The product of its digits is 737280, while the sum is 49.

The spelling of 82213853881 in words is "eighty-two billion, two hundred thirteen million, eight hundred fifty-three thousand, eight hundred eighty-one".