82172650 has 48 divisors (see below), whose sum is σ = 175417344. Its totient is φ = 28054080.

The previous prime is 82172639. The next prime is 82172659. The reversal of 82172650 is 5627128.

It is not an unprimeable number, because it can be changed into a prime (82172659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133744 + ... + 134356.

It is an arithmetic number, because the mean of its divisors is an integer number (3654528).

Almost surely, 2^82172650 is an apocalyptic number.

82172650 is an abundant number, since it is smaller than the sum of its proper divisors (93244694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82172650 is a wasteful number, since it uses less digits than its factorization.

82172650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 82172650 is about 9064.9131269969. The cubic root of 82172650 is about 434.7528432594.

Adding to 82172650 its reverse (5627128), we get a palindrome (87799778).

The spelling of 82172650 in words is "eighty-two million, one hundred seventy-two thousand, six hundred fifty".