82601220 has 48 divisors (see below), whose sum is σ = 249076800. Its totient is φ = 20332416.

The previous prime is 82601219. The next prime is 82601221. The reversal of 82601220 is 2210628.

It is an interprime number because it is at equal distance from previous prime (82601219) and next prime (82601221).

It is not an unprimeable number, because it can be changed into a prime (82601221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52170 + ... + 53729.

It is an arithmetic number, because the mean of its divisors is an integer number (5189100).

Almost surely, 2^82601220 is an apocalyptic number.

It is an amenable number.

82601220 is an abundant number, since it is smaller than the sum of its proper divisors (166475580).

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

82601220 is a wasteful number, since it uses less digits than its factorization.

82601220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105924 (or 105922 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 82601220 is about 9088.5213318779. The cubic root of 82601220 is about 435.5073483232.

Adding to 82601220 its reverse (2210628), we get a palindrome (84811848).

The spelling of 82601220 in words is "eighty-two million, six hundred one thousand, two hundred twenty".