82156222 has 8 divisors (see below), whose sum is σ = 124719336. Its totient is φ = 40583112.

The previous prime is 82156183. The next prime is 82156229. The reversal of 82156222 is 22265128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82156229) 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, 247293 + ... + 247624.

It is an arithmetic number, because the mean of its divisors is an integer number (15589917).

Almost surely, 2^82156222 is an apocalyptic number.

82156222 is a deficient number, since it is larger than the sum of its proper divisors (42563114).

82156222 is a wasteful number, since it uses less digits than its factorization.

82156222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495002.

The product of its digits is 3840, while the sum is 28.

The square root of 82156222 is about 9064.0069505710. The cubic root of 82156222 is about 434.7238693217.

The spelling of 82156222 in words is "eighty-two million, one hundred fifty-six thousand, two hundred twenty-two".