100320210 has 48 divisors (see below), whose sum is σ = 262618200. Its totient is φ = 26568960.

The previous prime is 100320197. The next prime is 100320211. The reversal of 100320210 is 12023001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 79334649 + 20985561 = 8907^2 + 4581^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100320192 and 100320201.

It is not an unprimeable number, because it can be changed into a prime (100320211) 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, 9670 + ... + 17150.

Almost surely, 2^100320210 is an apocalyptic number.

100320210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 100320210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131309100).

100320210 is an abundant number, since it is smaller than the sum of its proper divisors (162297990).

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

100320210 is a wasteful number, since it uses less digits than its factorization.

100320210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7643 (or 7640 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 100320210 is about 10015.9977036739. The cubic root of 100320210 is about 464.6537832171.

Adding to 100320210 its reverse (12023001), we get a palindrome (112343211).

The spelling of 100320210 in words is "one hundred million, three hundred twenty thousand, two hundred ten".