82218370 has 32 divisors (see below), whose sum is σ = 162397872. Its totient is φ = 29782272.

The previous prime is 82218359. The next prime is 82218371. The reversal of 82218370 is 7381228.

It can be written as a sum of positive squares in 8 ways, for example, as 44235801 + 37982569 = 6651^2 + 6163^2 .

It is not an unprimeable number, because it can be changed into a prime (82218371) 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, 924 + ... + 12856.

Almost surely, 2^82218370 is an apocalyptic number.

82218370 is a deficient number, since it is larger than the sum of its proper divisors (80179502).

82218370 is a wasteful number, since it uses less digits than its factorization.

82218370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12006.

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

The square root of 82218370 is about 9067.4345875777. The cubic root of 82218370 is about 434.8334589496.

Adding to 82218370 its reverse (7381228), we get a palindrome (89599598).

The spelling of 82218370 in words is "eighty-two million, two hundred eighteen thousand, three hundred seventy".