100220265 has 24 divisors (see below), whose sum is σ = 175261320. Its totient is φ = 52975104.

The previous prime is 100220261. The next prime is 100220299. The reversal of 100220265 is 562022001.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 100220121 = 12^2 + 10011^2 .

It is not a de Polignac number, because 100220265 - 2² = 100220261 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100220261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4770 + ... + 14939.

It is an arithmetic number, because the mean of its divisors is an integer number (7302555).

Almost surely, 2^100220265 is an apocalyptic number.

100220265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100220265 is a deficient number, since it is larger than the sum of its proper divisors (75041055).

100220265 is a wasteful number, since it uses less digits than its factorization.

100220265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19833 (or 19830 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 100220265 is about 10011.0071920861. The cubic root of 100220265 is about 464.4994266391.

Adding to 100220265 its reverse (562022001), we get a palindrome (662242266).

The spelling of 100220265 in words is "one hundred million, two hundred twenty thousand, two hundred sixty-five".