220197361 has 2 divisors, whose sum is σ = 220197362. Its totient is φ = 220197360.

The previous prime is 220197359. The next prime is 220197389. The reversal of 220197361 is 163791022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215531761 + 4665600 = 14681^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 220197361 - 2¹ = 220197359 is a prime.

Together with 220197359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (220197301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110098680 + 110098681.

It is an arithmetic number, because the mean of its divisors is an integer number (110098681).

Almost surely, 2^220197361 is an apocalyptic number.

It is an amenable number.

220197361 is a deficient number, since it is larger than the sum of its proper divisors (1).

220197361 is an equidigital number, since it uses as much as digits as its factorization.

220197361 is an evil number, because the sum of its binary digits is even.

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

The square root of 220197361 is about 14839.0485207105. The cubic root of 220197361 is about 603.8615395745.

The spelling of 220197361 in words is "two hundred twenty million, one hundred ninety-seven thousand, three hundred sixty-one".