100172227 has 4 divisors (see below), whose sum is σ = 100195056. Its totient is φ = 100149400.

The previous prime is 100172203. The next prime is 100172249. The reversal of 100172227 is 722271001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100172227 - 2¹¹ = 100170179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100172198 and 100172207.

It is not an unprimeable number, because it can be changed into a prime (100172257) 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 3 ways as a sum of consecutive naturals, for example, 2524 + ... + 14377.

It is an arithmetic number, because the mean of its divisors is an integer number (25048764).

Almost surely, 2^100172227 is an apocalyptic number.

100172227 is a deficient number, since it is larger than the sum of its proper divisors (22829).

100172227 is an equidigital number, since it uses as much as digits as its factorization.

100172227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22828.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 100172227 is about 10008.6076454220. The cubic root of 100172227 is about 464.4251995037.

It can be divided in two parts, 1001 and 72227, that multiplied together give a palindrome (72299227).

The spelling of 100172227 in words is "one hundred million, one hundred seventy-two thousand, two hundred twenty-seven".