102030218 has 16 divisors (see below), whose sum is σ = 154685160. Its totient is φ = 50471616.

The previous prime is 102030217. The next prime is 102030233. The reversal of 102030218 is 812030201.

It can be written as a sum of positive squares in 4 ways, for example, as 73908409 + 28121809 = 8597^2 + 5303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102030196 and 102030205.

It is not an unprimeable number, because it can be changed into a prime (102030217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91448 + ... + 92556.

Almost surely, 2^102030218 is an apocalyptic number.

102030218 is a deficient number, since it is larger than the sum of its proper divisors (52654942).

102030218 is a wasteful number, since it uses less digits than its factorization.

102030218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 102030218 is about 10101.0008415008. Note that the first 3 decimals coincide. The cubic root of 102030218 is about 467.2790082895.

Subtracting from 102030218 its sum of digits (17), we obtain a palindrome (102030201).

Adding to 102030218 its reverse (812030201), we get a palindrome (914060419).

The spelling of 102030218 in words is "one hundred two million, thirty thousand, two hundred eighteen".