82215388 has 6 divisors (see below), whose sum is σ = 143876936. Its totient is φ = 41107692.

The previous prime is 82215347. The next prime is 82215403. The reversal of 82215388 is 88351228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276920 + ... + 10276927.

Almost surely, 2^82215388 is an apocalyptic number.

It is an amenable number.

82215388 is a deficient number, since it is larger than the sum of its proper divisors (61661548).

82215388 is a wasteful number, since it uses less digits than its factorization.

82215388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20553851 (or 20553849 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 82215388 is about 9067.2701514844. The cubic root of 82215388 is about 434.8282018558.

The spelling of 82215388 in words is "eighty-two million, two hundred fifteen thousand, three hundred eighty-eight".