82216161 has 8 divisors (see below), whose sum is σ = 121801760. Its totient is φ = 54810756.

The previous prime is 82216151. The next prime is 82216163. The reversal of 82216161 is 16161228.

It is not a de Polignac number, because 82216161 - 2¹⁸ = 81954017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3045043 = 82216161 / (8 + 2 + 2 + 1 + 6 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82216163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1522495 + ... + 1522548.

It is an arithmetic number, because the mean of its divisors is an integer number (15225220).

Almost surely, 2^82216161 is an apocalyptic number.

It is an amenable number.

82216161 is a deficient number, since it is larger than the sum of its proper divisors (39585599).

82216161 is a wasteful number, since it uses less digits than its factorization.

82216161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045052 (or 3045046 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 82216161 is about 9067.3127772235. The cubic root of 82216161 is about 434.8295646224.

Adding to 82216161 its reverse (16161228), we get a palindrome (98377389).

The spelling of 82216161 in words is "eighty-two million, two hundred sixteen thousand, one hundred sixty-one".