82170650 has 24 divisors (see below), whose sum is σ = 154275840. Its totient is φ = 32558960.

The previous prime is 82170589. The next prime is 82170653. The reversal of 82170650 is 5607128.

It is not an unprimeable number, because it can be changed into a prime (82170653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2330 + ... + 13029.

It is an arithmetic number, because the mean of its divisors is an integer number (6428160).

Almost surely, 2^82170650 is an apocalyptic number.

82170650 is a deficient number, since it is larger than the sum of its proper divisors (72105190).

82170650 is a wasteful number, since it uses less digits than its factorization.

82170650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15478 (or 15473 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 82170650 is about 9064.8028108724. The cubic root of 82170650 is about 434.7493160812.

Adding to 82170650 its reverse (5607128), we get a palindrome (87777778).

The spelling of 82170650 in words is "eighty-two million, one hundred seventy thousand, six hundred fifty".