220381597 has 2 divisors, whose sum is σ = 220381598. Its totient is φ = 220381596.

The previous prime is 220381549. The next prime is 220381613. The reversal of 220381597 is 795183022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204747481 + 15634116 = 14309^2 + 3954^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220381597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220381507) 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 as a sum of consecutive naturals, namely, 110190798 + 110190799.

It is an arithmetic number, because the mean of its divisors is an integer number (110190799).

Almost surely, 2^220381597 is an apocalyptic number.

It is an amenable number.

220381597 is a deficient number, since it is larger than the sum of its proper divisors (1).

220381597 is an equidigital number, since it uses as much as digits as its factorization.

220381597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 220381597 is about 14845.2550331747. The cubic root of 220381597 is about 604.0299067469.

The spelling of 220381597 in words is "two hundred twenty million, three hundred eighty-one thousand, five hundred ninety-seven".