82161602 has 4 divisors (see below), whose sum is σ = 123242406. Its totient is φ = 41080800.

The previous prime is 82161601. The next prime is 82161613. The reversal of 82161602 is 20616128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78517321 + 3644281 = 8861^2 + 1909^2 .

It is not an unprimeable number, because it can be changed into a prime (82161601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20540399 + ... + 20540402.

Almost surely, 2^82161602 is an apocalyptic number.

82161602 is a deficient number, since it is larger than the sum of its proper divisors (41080804).

82161602 is a wasteful number, since it uses less digits than its factorization.

82161602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41080803.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 82161602 is about 9064.3037239492. The cubic root of 82161602 is about 434.7333584118.

The spelling of 82161602 in words is "eighty-two million, one hundred sixty-one thousand, six hundred two".