100220004 has 42 divisors (see below), whose sum is σ = 262964870. Its totient is φ = 33405696.

The previous prime is 100219967. The next prime is 100220009. The reversal of 100220004 is 400022001.

It can be written as a sum of positive squares in only one way, i.e., 99800100 + 419904 = 9990^2 + 648^2 .

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

It is not an unprimeable number, because it can be changed into a prime (100220009) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 14269 + ... + 20100.

Almost surely, 2^100220004 is an apocalyptic number.

It is an amenable number.

100220004 is an abundant number, since it is smaller than the sum of its proper divisors (162744866).

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

100220004 is an equidigital number, since it uses as much as digits as its factorization.

100220004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34391 (or 34374 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 100220004 is about 10010.9941564262. The cubic root of 100220004 is about 464.4990234124.

Adding to 100220004 its reverse (400022001), we get a palindrome (500242005).

The spelling of 100220004 in words is "one hundred million, two hundred twenty thousand, four".