82218730 has 32 divisors (see below), whose sum is σ = 162062208. Its totient is φ = 29784000.

The previous prime is 82218713. The next prime is 82218737. The reversal of 82218730 is 3781228.

It is a junction number, because it is equal to n+sod(n) for n = 82218692 and 82218701.

It is not an unprimeable number, because it can be changed into a prime (82218737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30955 + ... + 33505.

It is an arithmetic number, because the mean of its divisors is an integer number (5064444).

Almost surely, 2^82218730 is an apocalyptic number.

82218730 is a deficient number, since it is larger than the sum of its proper divisors (79843478).

82218730 is a wasteful number, since it uses less digits than its factorization.

82218730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 82218730 is about 9067.4544388158. The cubic root of 82218730 is about 434.8340936003.

Adding to 82218730 its reverse (3781228), we get a palindrome (85999958).

It can be divided in two parts, 82 and 218730, that added together give a palindrome (218812).

The spelling of 82218730 in words is "eighty-two million, two hundred eighteen thousand, seven hundred thirty".