100220249 has 2 divisors, whose sum is σ = 100220250. Its totient is φ = 100220248.

The previous prime is 100220233. The next prime is 100220257. The reversal of 100220249 is 942022001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62520649 + 37699600 = 7907^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 100220249 - 2⁴ = 100220233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100220249.

It is not a weakly prime, because it can be changed into another prime (100220209) 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 as a sum of consecutive naturals, namely, 50110124 + 50110125.

It is an arithmetic number, because the mean of its divisors is an integer number (50110125).

Almost surely, 2^100220249 is an apocalyptic number.

It is an amenable number.

100220249 is a deficient number, since it is larger than the sum of its proper divisors (1).

100220249 is an equidigital number, since it uses as much as digits as its factorization.

100220249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 100220249 is about 10011.0063929657. The cubic root of 100220249 is about 464.4994019203.

The spelling of 100220249 in words is "one hundred million, two hundred twenty thousand, two hundred forty-nine".