995000221 has 2 divisors, whose sum is σ = 995000222. Its totient is φ = 995000220.

The previous prime is 995000213. The next prime is 995000231. The reversal of 995000221 is 122000599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549199225 + 445800996 = 23435^2 + 21114^2 .

It is a cyclic number.

It is not a de Polignac number, because 995000221 - 2³ = 995000213 is a prime.

It is equal to p_50606128 and since 995000221 and 50606128 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 995000221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (995000231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497500110 + 497500111.

It is an arithmetic number, because the mean of its divisors is an integer number (497500111).

Almost surely, 2^995000221 is an apocalyptic number.

It is an amenable number.

995000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

995000221 is an equidigital number, since it uses as much as digits as its factorization.

995000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 995000221 is about 31543.6240942603. The cubic root of 995000221 is about 998.3306217269.

The spelling of 995000221 in words is "nine hundred ninety-five million, two hundred twenty-one", and thus it is an aban number.