82195220 has 12 divisors (see below), whose sum is σ = 172610004. Its totient is φ = 32878080.

The previous prime is 82195213. The next prime is 82195237. The reversal of 82195220 is 2259128.

It can be written as a sum of positive squares in 2 ways, for example, as 43903876 + 38291344 = 6626^2 + 6188^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2054861 + ... + 2054900.

It is an arithmetic number, because the mean of its divisors is an integer number (14384167).

Almost surely, 2^82195220 is an apocalyptic number.

It is an amenable number.

82195220 is an abundant number, since it is smaller than the sum of its proper divisors (90414784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82195220 is a wasteful number, since it uses less digits than its factorization.

82195220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109770 (or 4109768 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 82195220 is about 9066.1579514147. The cubic root of 82195220 is about 434.7926434988.

The spelling of 82195220 in words is "eighty-two million, one hundred ninety-five thousand, two hundred twenty".