220200997 has 2 divisors, whose sum is σ = 220200998. Its totient is φ = 220200996.

The previous prime is 220200989. The next prime is 220201019. The reversal of 220200997 is 799002022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208918116 + 11282881 = 14454^2 + 3359^2 .

It is a cyclic number.

It is not a de Polignac number, because 220200997 - 2³ = 220200989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220200947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110100498 + 110100499.

It is an arithmetic number, because the mean of its divisors is an integer number (110100499).

Almost surely, 2^220200997 is an apocalyptic number.

It is an amenable number.

220200997 is a deficient number, since it is larger than the sum of its proper divisors (1).

220200997 is an equidigital number, since it uses as much as digits as its factorization.

220200997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 220200997 is about 14839.1710347984. The cubic root of 220200997 is about 603.8648633026.

The spelling of 220200997 in words is "two hundred twenty million, two hundred thousand, nine hundred ninety-seven".