82201819 has 4 divisors (see below), whose sum is σ = 93944944. Its totient is φ = 70458696.

The previous prime is 82201813. The next prime is 82201829. The reversal of 82201819 is 91810228.

It is a happy number.

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

It is not a de Polignac number, because 82201819 - 2¹⁵ = 82169051 is a prime.

It is a super-2 number, since 2×82201819² = 13514278093817522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82201813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5871552 + ... + 5871565.

It is an arithmetic number, because the mean of its divisors is an integer number (23486236).

Almost surely, 2^82201819 is an apocalyptic number.

82201819 is a deficient number, since it is larger than the sum of its proper divisors (11743125).

82201819 is a wasteful number, since it uses less digits than its factorization.

82201819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11743124.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 82201819 is about 9066.5218799714. The cubic root of 82201819 is about 434.8042788870.

The spelling of 82201819 in words is "eighty-two million, two hundred one thousand, eight hundred nineteen".