82156218 has 16 divisors (see below), whose sum is σ = 164954880. Its totient is φ = 27278336.

The previous prime is 82156183. The next prime is 82156229. The reversal of 82156218 is 81265128.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25098 + ... + 28181.

It is an arithmetic number, because the mean of its divisors is an integer number (10309680).

Almost surely, 2^82156218 is an apocalyptic number.

82156218 is an abundant number, since it is smaller than the sum of its proper divisors (82798662).

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

82156218 is a wasteful number, since it uses less digits than its factorization.

82156218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53541.

The product of its digits is 7680, while the sum is 33.

The square root of 82156218 is about 9064.0067299181. The cubic root of 82156218 is about 434.7238622665.

The spelling of 82156218 in words is "eighty-two million, one hundred fifty-six thousand, two hundred eighteen".