82219831 has 4 divisors (see below), whose sum is σ = 82255552. Its totient is φ = 82184112.

The previous prime is 82219829. The next prime is 82219867. The reversal of 82219831 is 13891228.

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

It is a cyclic number.

It is not a de Polignac number, because 82219831 - 2¹ = 82219829 is a prime.

It is a super-2 number, since 2×82219831² = 13520201219337122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82219331) 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, 14151 + ... + 19096.

It is an arithmetic number, because the mean of its divisors is an integer number (20563888).

Almost surely, 2^82219831 is an apocalyptic number.

82219831 is a deficient number, since it is larger than the sum of its proper divisors (35721).

82219831 is a wasteful number, since it uses less digits than its factorization.

82219831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35720.

The product of its digits is 6912, while the sum is 34.

The square root of 82219831 is about 9067.5151502493. The cubic root of 82219831 is about 434.8360345619.

The spelling of 82219831 in words is "eighty-two million, two hundred nineteen thousand, eight hundred thirty-one".