82161316 has 6 divisors (see below), whose sum is σ = 143782310. Its totient is φ = 41080656.

The previous prime is 82161293. The next prime is 82161389. The reversal of 82161316 is 61316128.

It can be written as a sum of positive squares in only one way, i.e., 80460900 + 1700416 = 8970^2 + 1304^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270161 + ... + 10270168.

Almost surely, 2^82161316 is an apocalyptic number.

It is an amenable number.

82161316 is a deficient number, since it is larger than the sum of its proper divisors (61620994).

82161316 is a wasteful number, since it uses less digits than its factorization.

82161316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20540333 (or 20540331 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 82161316 is about 9064.2879477651. The cubic root of 82161316 is about 434.7328539836.

The spelling of 82161316 in words is "eighty-two million, one hundred sixty-one thousand, three hundred sixteen".